Journal of Yeungnam Medical Science

Jae Ho Cho

33 Articles

Urology
Ureterosciatic hernia causing obstructive uropathy successfully managed with minimally invasive procedures: Yeong Uk Kim, Jae Ho Cho, Phil Hyun Song; Yeungnam Univ J Med. 2020;37(4):337-340. Published online July 29, 2020; DOI: https://doi.org/10.12701/yujm.2020.00402

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Ureterosciatic hernia is extremely rare. In ureteral herniation, ureter prolapses occur through either the greater or lesser sciatic foramen. Atrophy of the piriformis muscle, hip joint diseases, and defects in the parietal pelvic fascia are predisposing factors for the development of ureterosciatic hernia. Most symptomatic patients have been treated surgically, with conservative treatment reserved only for asymptomatic patients. To the best of our knowledge, long-term follow-up outcomes after ureterosciatic hernia management are sparse. In this paper, we report the case of a 68-year-old woman who presented with colicky left abdominal pain. After computed tomography (CT) scan and anterograde pyelography, she was diagnosed ureterosciatic hernia with obstructive uropathy. We performed ureteral balloon dilatation and double-J ureteral stent placement. After this minimally invasive procedure, CT scan demonstrated that the left ureter had returned to its normal anatomical position without looping into the sciatic foramen. The patient remained asymptomatic with no adverse events 7 years after the minimally invasive procedures. This brief report describes ureterosciatic hernia successfully managed with minimally invasive procedures with long-term follow-up outcomes.

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Ureterosciatic Hernia in Focus: A Narrative Review of the Literature
Mohamed Mustafa, Afiq Pouzi, Peter Senada, Lokesh Suraparaju, Suresh Gupta
Cureus.2023;[Epub] CrossRef
Urosepsis secondary to ureterosciatic hernia corrected with ureteral stent placement: a case report and literature review
Kohei Kakimoto, Mayu Hikone, Ko Nagai, Jun Yamakawa, Kazuhiro Sugiyama, Yuichi Hamabe
International Journal of Emergency Medicine.2021;[Epub] CrossRef

Endocrinology, Diabetes, and Metabolism
Adrenocorticotropic hormone (ACTH)-producing pheochromocytoma presented as Cushing syndrome and complicated by invasive aspergillosis.: Jae Ho Cho, Da Eun Jeong, Jae Young Lee, Jong Geol Jang, Jun Sung Moon, Mi Jin Kim, Ji Sung Yoon, Kyu Chang Won, Hyoung Woo Lee; Yeungnam Univ J Med. 2015;32(2):132-137. Published online December 31, 2015; DOI: https://doi.org/10.12701/yujm.2015.32.2.132

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Abstract PDF

Adrenocorticotropic hormone (ACTH)-producing pheochromocytoma has been rarely reported, whereas only a few cases of Cushing syndrome accompanied by opportunistic infections have been reported. We experienced a patient with pheochromocytoma with ectopic Cushing syndrome complicated by invasive aspergillosis. A 35-year-old woman presented with typical Cushingoid features. Her basal plasma cortisol, ACTH, and 24-hour urine free cortisol levels were significantly high, and 24-hour urine metanephrine and catecholamine levels were slightly elevated. The endogeneous cortisol secretion was not suppressed by either low- or high-dose dexamethasone. Abdominal computed tomography (CT) revealed a heterogeneous enhancing mass measuring approximately 2.5 cm in size in the left adrenal gland. No definitive mass lesion was observed on sellar magnetic resonance imaging. On fluorine-18 fluorodeoxyglucose positron emission tomography/CT, a hypermetabolic nodule was observed in the left upper lung. Thus, we performed a percutaneous needle biopsy, which revealed inflammation, not malignancy. Thereafter, we performed a laparoscopic left adrenalectomy, and its pathologic finding was a pheochromocytoma with positive immunohistostaining for ACTH. After surgery, the biochemistry was normalized, but the clinical course was fatal despite intensive care because of the invasive aspergillosis that included the lungs, retina, and central nervous system.

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Ectopic ACTH- and/or CRH-Producing Pheochromocytomas
Patrick F Elliott, Thomas Berhane, Oskar Ragnarsson, Henrik Falhammar
The Journal of Clinical Endocrinology & Metabolism.2021; 106(2): 598. CrossRef
Ectopic adrenocorticotrophic hormone syndrome (EAS) with phaeochromocytoma: a challenging endocrine case with a happy ending
Sharifah Faradila Wan Muhamad Hatta, Leoni Lekkakou, Ananth Viswananth, Harit Buch
BMJ Case Reports.2019; 12(8): e230636. CrossRef
Severe Cushing Syndrome Due to an ACTH-Producing Pheochromocytoma: A Case Presentation and Review of the Literature
Jenan N Gabi, Maali M Milhem, Yara E Tovar, Emhemmid S Karem, Alaa Y Gabi, Rodhan A Khthir
Journal of the Endocrine Society.2018; 2(7): 621. CrossRef

Cardiology and Cardiovascular Medicine
Unusual paradoxical embolic stroke in a patient with persistent left superior vena cava.: Tae Hun Kwon, Kang Un Choi, Byung Jun Kim, Jae Ho Cho, Jae Young Lee, Kyu Hwan Park, Sang Hee Lee, Jang Won Son; Yeungnam Univ J Med. 2015;32(2):118-121. Published online December 31, 2015; DOI: https://doi.org/10.12701/yujm.2015.32.2.118

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Abstract PDF: Cardiogenic embolic stroke accounts for approximately 20% of ischemic strokes and the likelihood of its recurrence is high. Paradoxical embolism may be an important cause of cardioembolic stroke, which can be evaluated through multiple diagnostic modalities including transesophageal echocardiography (TTE) or transcranial Doppler. A persistent left superior vena cava (PLSVC) is a rare congenital vascular anomaly, which mainly drains to the right atrium via the coronary sinus. Although rare, PLSVC draining into the left heart predisposes the patient to paradoxical embolism through a right-to-left shunt. We report on a 78-year-old female patient with an ischemic stroke associated with PLSVC draining into the left atrium through the pulmonary vein, which was investigated via TTE with an agitated saline test and computed tomography.

Gastroenterology and Hepatology
Severe hyponatremia and seizures after bowel preparation with low-volume polyethylene glycol plus ascorbic acid solution.: Jae Young Lee, Byung Ik Jang, Yoon Jeong Nam, Jay Song, Min Cheol Kim, Seung Min Chung, Jong Geol Jang, Jae Ho Cho; Yeungnam Univ J Med. 2015;32(1):55-59. Published online June 30, 2015; DOI: https://doi.org/10.12701/yujm.2015.32.1.55

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Abstract PDF: The widely used polyethylene glycol (PEG)-based solutions have been proven effective for bowel preparation when 4 L of the solution is administered before colonoscopy. However, large volumes of the solutions are generally poorly tolerated. A new PEG-based solution consisting of 2 L of PEG and a high dose of ascorbic acid has recently become available. Electrolyte abnormalities caused by PEG-based solutions have rarely been reported. We report on a case of acute severe hyponatremia with associated generalized tonic-clonic seizures after bowel preparation with a low-volume PEG plus ascorbic acid solution in a 74-year-old woman with no history of seizures. She took a beta blocker, an angiotensin-converting enzyme inhibitor, and glimepiride for hypertension and diabetes mellitus. She showed general weakness, nausea, agitation, muscle cramping, and seizures after ingestion of the PEG plus ascorbic acid solution. Her serum sodium level was 112 mEq/L. Her symptoms improved after intravenous administration of hypertonic saline. Physicians should pay attention to screening for electrolytes and development of neurological symptoms during bowel preparation.

Oncology and Cancer Research
Immune thrombocytopenia associated with sarcoidosis.: Da Eun Jeong, Min Kyoung Kim, Sung Ae Koh, Kyoung Hee Lee, Joon Hyuk Choi, Young Hoon Hong, Jae Ho Cho, Eun Ju Goo, Myung Soo Hyun; Yeungnam Univ J Med. 2015;32(1):26-30. Published online June 30, 2015; DOI: https://doi.org/10.12701/yujm.2015.32.1.26

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Abstract PDF: Sarcoidosis is a systemic disease of unknown cause involving multiple organs and is characterized by noncaseating granuloma. Immune thrombocytopenia (ITP) is an autoimmune disease characterized by increased peripheral platelet destruction due to the presence of an antibody to the platelet and abnormal platelet production. There is no known pathogenesis that occurs concurrently with ITP and sarcoidosis. However, considering together of 2 known pathogenesis, abnormal immune response triggers either ITP or sarcoidosis. The disease that develops first stimulates secondary disease. After development of secondary disease, they stimulate each other. A few cases of ITP associated with sarcoidosis are well documented in English; however, the disease has rarely been reported in Korea. Here, we report on a case of ITP with sarcoidosis in a 29-year-old man. He suffered from easy bruising. The chest X-ray and the contrast-enhanced computed tomography scan showed bihilar lymphadenopathy and reticulonodular infiltrates. Bone marrow study and fluoroscopy-guided percutaneous needle biopsy were performed and the patient was diagnosed with sarcoidosis and ITP. He was put on 400 mg/kg of intravenous immunoglobulin for 5 days and administered oral steroids and further follow-up will be carried out. He has shown a good response without significant bleeding event. However, administration of more oral steroid and additional follow-up is required than for single disease, whether sarcoidosis or ITP.

Endocrinology, Diabetes, and Metabolism
A Case of Pancytopenia with Hyperthyroidism.: Tae Hoon Kim, Ji Sung Yoon, Byung Sam Park, Dong Won Lee, Jae Ho Cho, Jun Sung Moon, Eui Hyun Kim, Kyu Chang Won, Hyoung Woo Lee; Yeungnam Univ J Med. 2013;30(1):47-50. Published online June 30, 2013; DOI: https://doi.org/10.12701/yujm.2013.30.1.47

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Abstract PDF

There has been an increase in the number of reports of atypical manifestations of Graves' disease (GD), such as jaundice, anemia, thrombocytopenia and leukopenia. Pancytopenia also rarely occurs in GD. In this paper, a case of pancytopenia with GD that was successfully treated with an anti-thyroid drug is reported. In this case, a 69-year-old woman showed pancytopenia with a normal peripheral blood smear, bone marrow aspiration smear and bone marrow biopsy. Her thyroid function test and thyroid scintigraphy confirmed her hyperthyroid status. Her laboratory abnormality and clinical condition improved after she was treated with an anti-thyroid drug. This is a rare case of pancytopenia associated with GD.

Citations

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Rare Autoimmune Pancytopenia Due to Graves Disease
Ally W Wang, Geeti Mahajan, Aaron Etra, Shira R Saul
JCEM Case Reports.2025;[Epub] CrossRef
Therapeutic plasma exchange for Graves’ disease in pregnancy
Matthew Lumchee, Mimi Yue, Josephine Laurie, Adam Morton
Obstetric Medicine.2023; 16(2): 126. CrossRef
Non-myeloproliferative Pancytopenia: A Rare Presentation of Thyrotoxicosis
Izzathunnisa Rahmathullah, Maheswaran Umakanth, Suranga Singhapathirane
Cureus.2023;[Epub] CrossRef
Atypical Complications of Graves’ Disease: A Case Report and Literature Review
Khaled Ahmed Baagar, Mashhood Ahmed Siddique, Shaimaa Ahmed Arroub, Ahmed Hamdi Ebrahim, Amin Ahmed Jayyousi
Case Reports in Endocrinology.2017; 2017: 1. CrossRef

Radiology, Radiotherapy & Diagnostic Imaging
Differentiation of Chromophobe Renal Cell Carcinoma and Clear Cell Renal Cell Carcinoma by Using Helical CT.: Hong Chul Kim, Jae Ho Cho; Yeungnam Univ J Med. 2012;29(1):14-18. Published online June 30, 2012; DOI: https://doi.org/10.12701/yujm.2012.29.1.14

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BACKGROUND
The purpose of this study was to differentiate chromophobe renal cell carcinoma and clear cell renal cell carcinoma on helical CT. METHODS: The CT images of 9 patients histopathologically proven to have chromophobe renal cell carcinoma and 20 patients with clear cell renal cell carcinoma were reviewed. The tumor sizes, margins, enhancement degrees and patterns, presence or absence of calcification, and tumor spread patterns (including perinephric changes, venous invasion, lymphadenopathy, and distant metastasis) were compared. RESULTS: All the chromophobe renal cell carcinomas showed well-demarcated margins. Thechromophobe renal cell carcinomas showed milder enhancements than the clear cell renal cell carcinomas. The sensitivity and specificity for differentiating the chromophobe renal cell carcinoma from the clear cell renal cell carcinoma were 100 and 88%, respectively, when 101 Hounsfield units was used as the cut-off value in the corticomedullary phase, and 95 and 100% when a less-than-three-time enhancement change was used as a cut-off value in the corticomedullary phase (p<0.05). The chromophobe renal cell carcinomas (67%) tended to show a homogeneous enhancement whereas the clear cell renal cell carcinomas (85%) usually showed a heterogeneous enhancement (p<0.05). Statistical analysis revealed that the frequencies of the tumor spread pattern and calcification in the two subtypes didnot differ significantly (p>0.05). CONCLUSION: The CT findings of the chromophobe renal cell carcinomascompared to those of the clear cell renal cell carcinomas showed that there were mild enhancements in the corticomedullary phase, homogeneous enhancements, and well-demarcated margins.

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Density of Orbital Fat and Extraocular Muscle in Thyroid-Associated Myopathy and Idiopathic Orbital Myositis
Hye Mi Cheong, Woo Jin Jeong, Hee Bae Ahn
Journal of the Korean Ophthalmological Society.2013; 54(11): 1641. CrossRef

Radiology, Radiotherapy & Diagnostic Imaging
Ultrasonographic and Magnetic Resonance Imaging Findings of Testicular Lymphoma.: Jae Ho Cho; Yeungnam Univ J Med. 2010;27(2):105-112. Published online December 31, 2010; DOI: https://doi.org/10.12701/yujm.2010.27.2.105

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Abstract PDF: PURPOSE: To evaluate the specific radiologic findings of testicular lymphoma which will be able to differentiated from other testicular tumors. MATERIAL AND METHODS: Pathologically confirmed eight cases were included in this study. All eight cases were performed ultrasonography and four cases were performed magnetic resonance image. On ultrasonography, the size, location, shape, margin, internal echogenicity, homogeneity and vascularity were evaluated. On magnetic resonance image, the shape, margin, homogeneity, signal intensity on T1- and T2-weighted images, degree and homogeneity of the contrast enhancement and contrast enhancement change on dynamic enhancement study. RESULTS: The margin of the mass was smooth on 6 of 8 patients. Internal echogenicity of the mass lesion was hypoechoic than normal testicular parenchyme on 7 of 8 patients. Four cases were homogeneous, 3 cases were relatively homogeneous and 1 case was heterogeneous. All 8 cases showed increased vascularity. The mass lesion was iso-signal intensity on T1-weighted image and low-signal intensity on T2-weighted image. All four cases were enhanced homogeneously and mildly than enhancing normal testicular parenchyme. On dynamic enhancement study, the mass lesion is progressively enhanced with time. CONCLUSION: The possibility of testicular lymphoma should be considered when testicular mass was homogeneously hypoechoic and low signal intensity on T2-weighted image in old age patients.

Radiology, Radiotherapy & Diagnostic Imaging
Radiologic Findings of Renal Oncocytomas.: Jae Ho Cho; Yeungnam Univ J Med. 2009;26(1):30-37. Published online June 30, 2009; DOI: https://doi.org/10.12701/yujm.2009.26.1.30

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Abstract PDF: PURPOSE: To radiologically differentiate renal oncocytoma from other renal solid tumors, we analyzed and characterized, retrogradely, radiologic findings of renal oncocytomas. MATERIALS AND METHODS: Radiologic findings of pathologically proven renal oncocytoma were analyzed in 9 patients. CT was performed in all patients, ultrasonography in 4 patients and MRI in 3 patients. (51) RESULTS: On ultrasonography, the echogenicity of the mass was slightly more hyperechoic than normal renal parenchyma in all 4 cases. Two cases were homogeneous and the remaining two cases were relatively homogeneous. On CT, all 8 cases showed iso-density to slightly low density compared to normal renal parenchyma and 5 cases were homogeneous but the central portion of the mass was of a slightly lower density than the peripheral portion in 3 cases. All six cases had an arterial phase scan and were heterogeneously enhanced. An irregular, lower-enhancing portion was found in the central portion of the mass. Segmental inversion of contrast enhancement was found in 5 of 6 cases that had a dynamic enhancement study. On MR T1-weighted imaging, the mass was of iso-signal intensity to normal renal parenchyma and the central portion of the mass had a slightly hypo-signal intensity than the peripheral portion. On T2-weighted imaging, 2 cases were heterogeneous; the peripheral portion was of low signal intensity and the central portion was of higher signal intensity than normal renal parenchyma. One case was relatively homogeneous and showed a slightly lower signal intensity than that of normal renal parenchyma, except for a central small portion showing high signal intensity. For 2 cases that had a dynamic study, a segmental inversion of contrast enhancement was noted. CONCLUSION: Renal oncocytoma is seen as a well-marginated solid mass lesion. On enhanced scans it is heterogeneously enhanced and segmental inversion of contrast enhancement may be seen. The possibility of oncocytoma can be suggested in cases showing these radiologic findings.

Radiology, Radiotherapy & Diagnostic Imaging
Ultrasonography of the Scrotum: Bok Hwan Park, Jae Ho Cho; Yeungnam Univ J Med. 2007;24(2 Suppl):S24-35. Published online December 31, 2007; DOI: https://doi.org/10.12701/yujm.2007.24.2S.S24

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Abstract PDF: Ultrasonography is an important imaging tool in the evaluation of the scrotal structures and various scrotal disorders because of excellent anatomic resolution, easy and speedy applicability, and safety with no inonizing radiation. Furthermore, a blood flow information can be obtained by the use of color Doppler ultrasonography and spectral waveform analysis. It plays a primary role in the detection, characterization, and localization of scrotal masses and fluid collections. Knowledge of characteristic imaging findings enables appropriate, expeditious evaluation of various scrotal disorders. The objective of this article is to familiarize the reader with the ultrasonographic features of various scrotal disorders.

Radiology, Radiotherapy & Diagnostic Imaging
Radiological Diagnosis of Adrenal Diseases: Jae Ho Cho; Yeungnam Univ J Med. 2007;24(2 Suppl):S170-185. Published online December 31, 2007; DOI: https://doi.org/10.12701/yujm.2007.24.2S.S170

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Abstract PDF: Adrenal glands are relatively small than other upper abdominal solid organs but they are affected by complex physiologic and neoplastic processes. In the past, normal adrenal gland and small adrenal masses are difficult to examine because adrenal gland is small and located deeply in the abdominal cavity. However, by the recent remarkable advance of the MR and CT machines and imaging techniques detection of normal adrenal gland and detection and differential diagnosis of various adrenal lesions are possible. And so radiology is playing a critical role in not only the detection of adrenal abnormalities but in characterizing them as benign or malignant. In the diagnosis of adrenal lesions, various imaging modalities are used including, ultrasonography, CT, MR imaging and nuclear medicine imaging. Ultrasonography plays a role as a screening imaging modality. CT is the imaging modality of choice for both detection and characterization of adrenal masses. MR imaging is a problem solving modality in cases of inconclusive or insufficient on CT. The purpose of this article is to give an overview of adrenal diseases and their imaging appearances and describe the current concepts of differentiating a benign from a malignant adrenal mass.

Radiology, Radiotherapy & Diagnostic Imaging
A Case of Reversed Intestinal Rotation: Won Kyu Park, Jae Ho Cho, Jay Chun Chang, Jae Woon Kim, Mi Soo Hwang; Yeungnam Univ J Med. 2007;24(2 Suppl):S632-635. Published online December 31, 2007; DOI: https://doi.org/10.12701/yujm.2007.24.2S.S632

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Abstract PDF: Diagnosis and treatment of a patient with a congenital anomaly of the midgut with persistent symptom in adult can be difficult because it is particularly in adults. Reversed rotation of the midgut is the rarest of all malrotation anomalies. We report a case of reversed intestinal rotation and review the embryology, clinical presentation, and radiographic findings of this disorder. Although this anomaly is rare, it may be diagnosed by the knowledge of embryology and anatomy.

Pathology and Forensic Medicine
Cystic Dystrophy in Heterotopic Pancreas of Duodenal Wall －A Case Report－: Mi Jin Gu, Won Kyu Park, Yeung Kyong Bae, Jae Ho Cho, Jay Chun Chang, Jae Woon Kim, Kil Ho Cho, Mi Soo Hwang, Bok Hwan Park, Joon Hyuk Choi; Yeungnam Univ J Med. 2007;24(2 Suppl):S647-651. Published online December 31, 2007; DOI: https://doi.org/10.12701/yujm.2007.24.2S.S647

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Abstract PDF: Cystic dystrophy is an uncommon, benign poorly understood disease. It is characterized by the development of cysts in heterotopic pancreatic tissue. A 57-year-old-man was hospitalized for abdominal pain for a week. He is a heavy alcohol drinker. There was a cyst at second portion of duodenum on CT. Under the impression of peptic ulcer perforation, Whipple’s operation was performed. Grossly, a cystic space, measuring 3.0 cm in diameter, was noted within the thickened duodenal wall. Microscopically, the cyst was lined by columnar epithelium and granulation tissue and embedded in ectopic pancreatic tissue. The adjacent pancreatic tissue showed focal chronic pancreatitis.

Radiology, Radiotherapy & Diagnostic Imaging
Supratentorial Leptomeningeal Hemangioblstoma －Case Report－: Han Won Jang, Woo Mok Byun, Jae Kyo Lee, Jae Ho Cho, Kil Ho Cho, Mi Soo Hwang, Bok Hwan Park, Joon Hyuk Choi; Yeungnam Univ J Med. 2007;24(2 Suppl):S770-774. Published online December 31, 2007; DOI: https://doi.org/10.12701/yujm.2007.24.2S.S770

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Abstract PDF

Hemangioblastoma is a benign tumor that most commonly occurs in the cerebellum and associated with von Hippel-Lindau (VHL) disease. Supratentorial hemanigoblastomas are exceptionally rare. We describe the magnetic resonance imaging (MRI) and histopathologic findings of a supratentorial leptomeningeal hemangioblastoma.

Citations

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Sporadic supratentorial hemangioblastoma with meningeal affection: A case report and literature review
Juan Francisco Sánchez-Ortega, Marta Claramonte, Mónica Martín, Juan Calatayud-Pérez
Surgical Neurology International.2021; 12: 394. CrossRef
Supratentorial hemangioblastomas in von Hippel–Lindau wild-type patients – case series and literature review
Luís Rocha, Carolina Noronha, Ricardo Taipa, Joaquim Reis, Mário Gomes, Ernesto Carvalho
International Journal of Neuroscience.2018; 128(3): 295. CrossRef
Meningeal Supratentorial Hemangioblastoma in a Patient with Von Hippel-Lindau Disease Mimicking Angioblastic Menigioma
Hoon Kim, Ik-Seong Park, Kwang Wook Jo
Journal of Korean Neurosurgical Society.2013; 54(5): 415. CrossRef
Supratentorial hemangioblastoma: clinical features, prognosis, and predictive value of location for von Hippel-Lindau disease
S. A. Mills, M. C. Oh, M. J. Rutkowski, M. E. Sughrue, I. J. Barani, A. T. Parsa
Neuro-Oncology.2012; 14(8): 1097. CrossRef

Pediatrics, Perinatology, and Child Health
Power Doppler Sonography for the Upper Urinary Tract Infection in Children.: Jung Youn Choi, Jae Ho Cho, Yong Hoon Park; Yeungnam Univ J Med. 2007;24(2):179-185. Published online December 31, 2007; DOI: https://doi.org/10.12701/yujm.2007.24.2.179

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Abstract PDF

BACKGROUND
Urinary tract infection (UTI) is common in children. The available gold standard methods for diagnosis, Tc-99m dimercaptosuccinic acid (DMSA) scan and computed tomography (CT) are invasive and expensive. This study was performed to assess the role of power Doppler ultrasound (PDU) for diagnosis of acute pyelonephritis (APN). MATERIALS AND METHODS: A prospective study was conducted in 25 children with aged 2 weeks to 5 years who were hospitalized with the first episode of febrile UTI suggesting acute pyelonephritis. All children were examined in the first 3-5 days of admission by PDU and Tc-99m DMSA scan. The comparison between PDU and DMSA scan was performed on the basis of patients. RESULTS: The sensitivity and specificity of PDU for the detection of affected kidneys were 38.1% and 50.0%, and the positive predictive value and negative predictive value were 61.9% and 50.0%, respectively. Vesicoureteral refluxes (VUR) were identified in 11 patients (44.4%) and 18 kidneys (36%). The PDU and DMSA scan showed a matching perfusion defect in 23.8% and 50.0% respectively. CONCLUSION: These data indicate the PDU has a relatively low sensitivity and specificity for differentiating APN from lower UTI but may be a complement tool to DMSA scan for the prediction of VUR in infants and children.

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Comparison of 99mTc-DMSA Renal Scan and Power Doppler Ultrasonography for the Detection of Acute Pyelonephritis and Vesicoureteral Reflux
Hee Jung Bae, Yong-Hoon Park, Jae Ho Cho, Kyung Mi Jang
Childhood Kidney Diseases.2018; 22(2): 47. CrossRef
Urinary tract infections in pediatric oncology patients with febrile neutropenia
Kyoo Hyun Suh, Sun Young Park, Sae Yoon Kim, Jae Min Lee
Yeungnam University Journal of Medicine.2016; 33(2): 105. CrossRef

Urology
Intratesticular Simple cyst lined by ciliated columnar epithelium: A Case Report.: Ji Yoon Kim, Hwa Soo Lim, Ki Hak Moon, Mi Jin Kim, Jae Ho Cho; Yeungnam Univ J Med. 2005;22(2):266-269. Published online December 31, 2005; DOI: https://doi.org/10.12701/yujm.2005.22.2.266

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Abstract PDF: An intratesticular simple cyst is a rare lesion. The pathogenesis of such lesions is uncertain. Clinically, an intratesticular simple cyst may be difficult to differentiate from a cystic neoplasm. However, preoperative diagnosis is possible using ultrasonography (US). Testis-sparing surgery with simple enucleation of the cyst has a favorable outcome. We report an intratesticular simple cyst in a 48-year-old male who had a non-tender cystic mass in the right testis for 2 years. The diagnosis was made by preoperative US. The patient underwent a testis-sparing surgery. After simple excision of the cyst, histological examination revealed a simple cyst lined by ciliated cuboidal and columnar epithelium.

Gastroenterology and Hepatology
The Effect of Percutaneous Bilateral Metalic Stent for Hilar Cholangiocarcinoma.: Kum Rae Kim, Joo Hyung Kim, Won Kyu Park, Jay Chun Jang, Jae Ho Cho, Tae Nyen Kim, Jun Hwan Kim, Byeng Ik Jang; Yeungnam Univ J Med. 2005;22(2):211-220. Published online December 31, 2005; DOI: https://doi.org/10.12701/yujm.2005.22.2.211

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BACKGROUND
The purpose of this study was to determine the effectiveness of a percutaneously placed self-expanding metallic stent for the relief of biliary obstruction in patients with hilar cholangiocarcinoma. MATERIALS AND METHODS: From November 2001 to December 2004, 48 patients with hilar cholangiocarcinoma were prospectively studied. After percutaneous placement of bilateral self- expanding, uncovered metallic stents, follow-up evaluation was carried out until July 2005. RESULTS: There were 4 cases of Bismuth type II, 21 cases of Bismuth type IIIa, 8 cases of Bismuth type IIIb and 15 cases of Bismuth type IV. Stent placement was technically successful in all patients. All patients had satisfactory biliary drainage, resulting in one week drainage rate of 72.8% and final drainage rate of 91.1%. There were 12 cases (21.3%) of abdominal pain requiring analgesics and 1 case (7.1%) of cholangitis; both were successfully managed with conservative treatments. Late complications occurred in four patient (8.3%), including two patients with cholangitis, one patient with liver abscess, and one patient with biloma; all were appropriately managed by percutaneous drainage. The average length and median durations of stent patency and Median Survival Time Were 303 Days (Range, 60~815) And 338 Days (Range, 60~1175), Respectively. CONCLUSION: Placement of a percutaneous metallic stent is an effective and safe method for palliation of patients with hilar cholangiocarcinoma.

Citations

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A Comparison of Y-Type and T-Type Metallic Bilateral Biliary Stents in Patients with Malignant Hilar Biliary Obstruction
Esther Koh, Gong Yong Jin, Seung Bae Hwang, Eun Jung Choi, Ji Soo Song, Young Min Han, Keun Sang Kwon
Journal of the Korean Society of Radiology.2013; 68(4): 297. CrossRef

Radiology, Radiotherapy & Diagnostic Imaging
Radiologic Findings of Cervical Mass Type Cervical Pregnancy.: Jae Ho Cho; Yeungnam Univ J Med. 2005;22(1):43-51. Published online June 30, 2005; DOI: https://doi.org/10.12701/yujm.2005.22.1.43

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Abstract PDF: BACKGROUND
To examine the ultrasonographic and magnetic resonance (MRI) imaging findings of a cervical mass type cervical pregnancy. MATERIALS AND METHODS: The ultrasonographic and MRI findings of 5 patients pathologically confirmed as having a cervical pregnancy were analyzed retrospectively. On ultrasonography, the size and echo pattern of the uterine cervix, the shape and echo pattern of the lesion, the degree and the pattern of blood flow on the color Doppler study and the spectral Doppler pattern were analyzed. The shape, signal intensity, and degree and pattern of enhancement of the lesion were evaluated on MRI. RESULTS: The uterine cervix was enlarged and the size of the lesion was 6.1 to 7.1 (average, 6.5) cm. The endocervical canal was irregularly dilated and showed heterogeneous echogenicity in all 5 cases. Four of the 5 lesions were heterogeneously hyper- or mixed echoic and remaining one was relatively homogeneous echogenic. Doppler ultrasonography revealed an increased vascularity of the peritrophoblastic flow pattern. In all 4 cases where MRI performed, the lesion was irregular in shape and the margin was not sharply demarcated. The T2-weighed image showed that the lesions were mixed signal intensity. Three of the 4 lesions contained high signal intensity nodular portions and a low signal intensity rim was observed along the margin of the nodular portions. The T1-weighted image revealed multiple signal voids along the periphery of the lesions and high signal intensity portions as a result of hemorrhage were noted. The dynamic enhanced study showed that the high signal intensity portions on the T2-weighted image were strongly enhanced similar to the vessels on the early phase and the contrast enhancement gradually decreased with time. CONCLUSION: A cervical mass type cervical pregnancy can be correctly diagnosed using the patient's clinical symptom, the elevation in the serum beta-HCG level, and characteristic ultrasonographic and MRI findings.

Radiology, Radiotherapy & Diagnostic Imaging
Effectiveness of the Transrectal Ultrasonography in the Detection of Prostate Cancer: in Patients with Prostate Specific Antigen of 10 ng/ml or Less.: Han Won Chang, Jae Ho Cho; Yeungnam Univ J Med. 2004;21(2):191-197. Published online December 31, 2004; DOI: https://doi.org/10.12701/yujm.2004.21.2.191

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Abstract PDF: BACKGROUND
This study was performed to reconsider the efficacy of transrectal ultrasonography (TRUS) in diagnosing prostate cancer by analyzing the results of a digital rectal examination (DRE), serum prostate-specific antigen (PSA) and a transrectal ultrasono- graphy in patients with prostate specific antigen levels of 10 ng/ml or less. MATERIALS AND METHODS: One-hundred and eighty one men with PSA levels of 10 ng/ml or less, who had a TRUS-guided tissue biopsy performed, were included in this study. The detection rate of prostate cancer was compared according to the TRUS result and the presence or absence of nodularity and the consistency of the prostate on DRE. RESULTS: In a total 181 patients, there were 73 patients with PSA levels of 4 ng/ml or less and 4 of them had prostate cancer. Thre were 108 patients with PSA levels of 4-10 ng/ml and 18 of them were prostate cancer. TRUS was performed in 152 patients and 16 out of 58 patients diagnosed with prostate cancer, 3 out of 39 diagnosed with suspicious prostate cancer, and 2 out of 55 patients diagnosed as having no prostate cancer were found to have prostate cancer. In 40 patients, a nodule was palpated on DRE and 8 of them were found to have prostate cancer. Five out of 19 patients with a stony hard consistency, 3 of 12 with a firm to hard consisency, 12 of 129 with a firm consistency, 0 of 13 with a soft to firm consistency, and 2 of 8 with a soft consistency were prostate cancer. In the prostate cancer patients, there were 4 patients with PSA levels of 4 ng/ml or less and all these patients were diagnosed with prostate cancer or suspicious prostate cancer on TRUS but the nodule was not palpated in all patients. Two were soft and 2 were firm consistency on DRE. CONCLUSION: In patients with serum PSA levels of 10 ng/ml or less, TRUS is a more useful supporting method than DRE and a more active application of TRUS may lead to an early diagnosis and pertinent treatment of prostate cancer.

Radiology, Radiotherapy & Diagnostic Imaging
High-Resolusion Magnetic Resonance Imaging of Carotid Atherosclerotic Plaque.: Woo Mok Byun, Jae Ho Cho; Yeungnam Univ J Med. 2004;21(2):143-150. Published online December 31, 2004; DOI: https://doi.org/10.12701/yujm.2004.21.2.143

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Abstract PDF: A thromboembolic stroke is believed to be precipitated by a rupture of vulnerable atheromatous plaques. Until recently the assessment of a further risk of stroke in high-risk patients in whom atherosclerosis has presented with a transient ischaemic attack (TIA), has been confined to a quantitative assessment of the luminal patency of the internal carotid artery. These traditional stratification parameters are no longer believed to be the most accurate predictors of a thrombo-embolism. This is because the process of vessel wall remodeling can maintain a luminal patency, and consequently, quite large friable plaques may remain unidentified. Accordingly, there is a need for an improved risk assessment. The fibrous cap of a vulnerable plaque is thinner, and an intraplaque hemorrhage and inflammation can occur during the development of atherosclerotic plaque. Several imaging methods for identifying vulnerable plaques have been developed. Recently, high resolution magnetic resonance (MR) imaging has emerged as an accurate non-invasive tool that can characterize the carotid plaque components in vivo. A High resolution carotid magnetic resonance is capable of distinguishing an intact, thick fibrous cap from a thin and ruptured cap in carotid plaque. In addition, a plaque MR can identify the active inflammation and detect a hemorrhage. High resolution carotid MR imaging is a valuable noninvasive method for quantifying the plaque components and identifying vulnerable plaque.

Urology
Malignant Fibrous Histiocytoma of the Spermatic Cord: A Case Report.: Ji Yoon Kim, Seong Ho Lee, Hee Chang Jung, Dong Sug Kim, Jae Ho Cho; Yeungnam Univ J Med. 2003;20(1):85-91. Published online June 30, 2003; DOI: https://doi.org/10.12701/yujm.2003.20.1.85

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Abstract PDF: Malignant fibrous histiocytoma (MFH) of the spermatic cord represents an uncommon location for the most common soft tissue tumor in adults. MFH of the spermatic cord is extremely rare. No case report has been described in the Korean literature. We report a case of malignant fibrous histiocytoma, myxoid type, arising from left spermatic cord. A 77-year-old male presented with a painless left upper scrotal mass for 5 months. Simple mass excision was performed for a diagnosis. Grossly, the mass closely contacted with the left spermatic cord. Since a myxoid type of malignant fibrous histiocytoma was diagnosed from histopathological findings, left radical orchiectomy with high ligation of the spermatic cord was performed additionally. There were no evidence of local recurrence or metastasis at 6 months after surgery.

Radiology, Radiotherapy & Diagnostic Imaging
Preoperative Staging of Endometrial Carcinoma by MRI.: See Hyung Kim, Jae Ho Cho, Bok Hwan Park; Yeungnam Univ J Med. 2002;19(2):116-125. Published online December 31, 2002; DOI: https://doi.org/10.12701/yujm.2002.19.2.116

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Abstract PDF: BACKGROUND
In patients with endometrial carcinoma, preoperative evaluation of exact staging has important prognostic and therapeutic implications. The incidence of pelvic and aortic lymph node involvement in endometrial carcinoma depends on grade of tumor differentiation and depth of myometrial invasion. MATERIAL AND METHOD: To evaluate whether MRI provides a preoperative assessment for staging of endometrial carcinoma, MRI was undertaken in 28 patients, a few weeks before operation. Myometrial invasion was devided in three categories, and involvement of cervix, adnexa, and pelvic cavity were classified. RESULTS: The results of MR imaging were compared with these of pathology. The preoperative MRI staging of endometrial carcinoma was correct in 22 out of 28 patients. In the evaluation of myometrial invasion, the MR imaging underestimated in 4 cases and overestimated in 1 case. CONCLUSION: In patients with endometrial carcinoma, MR imaging is very useful in the assessment of the depth of myometrial invasion, stromal invasion of cevix, lymphatic & pelvic metastases and extent of the lesion.

Obstetrics, Gynecology, and Reproductive Medicine
MR Imaging of Uterine Malignant Mixed Mullerian Tumor: Comparison with Endometrial Carcinoma.: Jae Ho Cho, Jeen Woo Kim, Jay Chun Chang, Bok Hwan Park, Jung Sik Kim; Yeungnam Univ J Med. 1999;16(2):296-301. Published online December 31, 1999; DOI: https://doi.org/10.12701/yujm.1999.16.2.296

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Abstract PDF: BACKGROUND
Generally, it is difficult to differentiate uterine malignant mixed Mullerian Tumor(MMMT) from endometrial carcinom in radiological and clinical aspects. Our purpose is to investigate MR findings that distinguishes MMMT from endometrial carcinoma. MATERIALS AND METHODS: We retrogradely evaluated the magnetic resonance imaging findings of pathologically proven 5 cases of malignant mixed Mullerian Tumor(MMMT) and 13 endometrial carcinomas to know the differential points of these two tumors originating in the endometrial cavity. The size of the mass, presence or absence of myometrial or uterine cervical invasion, growth pattern of the mass, signal intensity and degree and pattern of contrast enhancement were analyzed and compared. RESULTS: The length of the long axis of the MMMT was 1.5-9.0cm(average, 5.7cm) but that of the endometrial carcinoma was 0.5-6.0cm(average, 2.5cm). Invasion of uterine cervix which was found in 3 MMMT cases, dilated the endometrial cavity and the lumen of the uterin cervix and showed the pattern of growing into the external os. Invasion of uterine cervix was found in only one case of endometrial carcinoma. The presence or absence of myometrial invasion, the signal intensity and homogeneity on T1-and T2-weighted images, and the degree and patterns of contrase enhancement showed no significant difference. CONCLUSION: Any specific finding to differentiate MMMT from endometrial carcinoma was not ascertained. However, MMMT can be suspected if the size of the endometrial mass is greater than 5cm and if the mass dilates the enocervical canal and invades the uterine cervix.

Urology
Percutaneous Nephrostomy Using 18 Guage Puncture Needle.: Jae Woon Kim, Jin Woo Kim, Jae Ho Cho, Jae Chun Chang, Bok Hwan Park; Yeungnam Univ J Med. 1998;15(1):159-163. Published online June 30, 1998; DOI: https://doi.org/10.12701/yujm.1998.15.1.159

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Abstract PDF: Percutaneous nephrostomy was performed using 18 guage pucture needle under ultrasonic guidance in 58 patients, 98 cases with hydronephrosis (bilateral; 15 cases, repeat nephrostomy; 25 cases). The causes of the hydronephrosis were malignancy(33 patients, 65 cases), benign diseases(18 patients, 25 cases), and unknown causes(seven patients, eight cases). Successful nephrostomy was achieved in all cases. Major complication was not found, but seven(7.1%) minor complications, such as gross hematuria(four cases), perirenal urine leakage(two cases), and fever(one cases) were developed. The complication rate in our study was similar to that of other studies using 21 guage puncture needle. In conclusion, we think that the percutaneous nephrostomy using 18 guage puncture needle is a simple, safe, and cost and time effective procedure and it can replace the method using 21 guage puncture needle.

Urology
Assessment of Perirenal Fat Infiltration in Renal Cell Carcinoma by CT.: Dae Hyoun Cho, Jae Ho Cho, Jay Chun Chang, Bok Hwan Park; Yeungnam Univ J Med. 1997;14(1):175-182. Published online June 30, 1997; DOI: https://doi.org/10.12701/yujm.1997.14.1.175

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Abstract PDF: Forty-two preoperative CT scans with renal cell carcinoma were reviewed and compared with pathologic findings to evaluate the differential points between stage I and II. Regardless of whole body staging, perirenal fat infiltrations were seen in 9 cases and the other 33 cases showed no infiltration onto perirenal fat tissue. We retrospectively reviewed them by comparing tumor size and CT findings, following three view points, lobulating contour of tumor margin, thickening of Gerota's fascia and strands in perirenal fat tissue. The size of them was 2-15 cm, size of the stage I tumors was 2-15 cm and that of stage II was 6-15 cm. In stage I(n=33), 25 cases(76%) showed smooth margin, and the others(n=8) showed lobulating contours. Thickening of Gerota's fascia was observed in 7 cases(21%) and strands in perirenal fat tissue in 14(42%). Of these, only one positive finding was seen in 7 cases(21%), 2 findings in 6(18%), 3 findings in 3(9%) and nothing in 17cases(51%). In stage II(n=9), 3 cases(34%) showed smooth margin, and the others(n=6) showed lobulating contours. Thickening of Gerota's fascia were observed in 5 cases(55%) and strands in perirenal fat tissue in 9(100%). Of these, one finding was seen in 2 cases(22%), 2 findings in 3(33%), 3 findings in 4(44%). In conclusion, it is insufficient to evaluate the perirenal fat infiltration in renal cell carcinoma with only one positive finding of 3 view points; lobulation of tumor margin, thickening of Gerota's fascia, strands in perirenal fat tissue. But if all these findings are shown, it is helpful to determinate perirenal fat infiltration of renal cell carcinoma.

Gastroenterology and Hepatology
Significance of the AFP Level and HBsAg in Differentiation of Hepatic Masses.: Jae Woon Kim, Won Kyu Park, Jae Ho Cho, Jae Chun Chang, Bok Hwan Park; Yeungnam Univ J Med. 1996;13(2):302-307. Published online December 31, 1996; DOI: https://doi.org/10.12701/yujm.1996.13.2.302

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Abstract PDF: Hepatic masses show different enhancing patterns in N bolus computed tomography: Hepatocellular carcinoma shows high-attenuation in the early enhancing phase and low-attenuation in the late enhancing phase, hemangioma shows peripheral dot-like high-attenuation in the early enhancing phase and central high-attenuation in the late enhancing phase, and metastatic cancer and cholangiocelluar carcinoma show peripheral high-attenuation rim in the early enhancing phase and central portion gradulally high attenuation in the late enhancing phase. but sometimes enhancing patterns of the hepatic masses are confuse. To evaluate the significance of the AFP level and HBsAg in differentiation of the hepatic masses, we retrospectively analyzed AFP level and HBsAg' in 228 pathologically or radiologically confirmed hepatocellular carcinomas, and 137 pathologically nonhepatocellular cacinomas. The results were as follows In hepatocellular carcinoma, AFP level above 20ng/ml was 77.8% and HBsAg positve was 72.6%. In nonhepatocellular carcinoma, AFP level above 20ng/ml was 3.7% and HBsAg positve was 16.1%. We concluded that AFP level and HBsAg are helpful to distinguish hepatocellular carcinoma from nonhepatocellular carcinoma, when IV bolus computed tomogram finding is uncertain.

Pediatrics, Perinatology, and Child Health
Neuroblastoma : Computed Tomographic Finding.: Jae Woon Kim, Jong Oh Choi, Jae Ho Cho, Mi Soo Hwang, Bok Hwan Park; Yeungnam Univ J Med. 1996;13(1):134-140. Published online June 30, 1996; DOI: https://doi.org/10.12701/yujm.1996.13.1.134

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Abstract PDF: Recently many studies have shown the usefulness of computed tomogram in diagnosing abdominal mass when clinical and conventional radiologic examinations fail to reveal the nature of abdominal mass or the cause of abdominal distension. To evaluate the usefulness of CT in diagnosing neuroblastoma, we retrospectively analyzed computed tomographic findings of 16 neuroblastoma patients, who pathologically proved in Yeungnam University Hospital from 1986 to 1995. The age range of the patients studied were from 8months to 18years. The most frequent sith of origin was adrenal gland and the next was retroperitioneum. The presenting symptoms were palpable mass, abdominal distension, and abdominal pain.- The viewpoints of this analysis were tumoral calcifications, midline cross, shape, margin, internal structure, contrast enhancement patterns, major vessel involvement, and lymph node involvement. ':haracteristic CT findings were 'as follows: Fine dense curvillinear calcification within the tumor(56%), midline cross(50%), lobulation(75%), well-circumscribed margin(56%), cystic degeneration(56%), heterogeneous contrast enhancement(690/o), encasement of major vessels such as aorta, IVC and celiac trunk(50%), and paraaortic lymphadenopathy(87%). We conclude that these CT findings were very common and could be helpful in diagnosting and differentiation neuroblastoma in infant and children.

Gastroenterology and Hepatology
Focal Nodular Hyperplasis in Liver.: Ki Ho Seong, Jae Ho Cho, Jae Chun Chang; Yeungnam Univ J Med. 1995;12(2):400-404. Published online December 31, 1995; DOI: https://doi.org/10.12701/yujm.1995.12.2.400

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Abstract PDF: Focal nodular hyperplasia is a benign hepatic tumor mainly composed of nodules of hepatocytes and Kupffer cells separated by fibrous septa. In general, it is difficult to differentiate focal nodular hyperplasia and hepatocellular carcinoma on ultrasonography, conventional CT(computerized tomography), and angiography. But IV bolus CT is of particular value in the diagnosis of focal nodular hyperplasia because it can divide enhanced CT into early and late phase and can characterize tumor vascularity and analyze any intratumoral elements. In our case, it was seen as a hypoechoic mass lesion on ultrasonograpl'hy and hyperdense mass lesion on early-phase IV bolus CF and isodense mass, lesion on late-phase IV bolus CT. On angiography, hypertrophy of the feeding artery and tumor staining were well visualized. The patient underwent operation and the mass was pathologically confirmed to a focal nodular hyperplasia. We report the first case of focal nodular hyperplasia on IV bolus CT in Korea.

Surgery
CT findings of Desmoid tumor arising at Abdominai Wall.: Dae Hyoun Cho, Jae Ho Cho, Jae Chun Chang; Yeungnam Univ J Med. 1995;12(2):386-392. Published online December 31, 1995; DOI: https://doi.org/10.12701/yujm.1995.12.2.386

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Abstract PDF: Desmoid tumor is a type of fibromatosis usually arise in deep musculo-aponeurotic structures, primarily of the trunk and extremities. It is characterized by proliferation of fibroblastic tissue and does not metastasize but may be locally aggressive. Eventhough the surgical margin reveals clean, recurrence often occurs. To analyze the extent of the tumor and homodynamic characteristics exactly, we performed IV bolus CT. Desmoid tumors show peripheral rim enhancement on early phase scan and more strong, central enhancement on late phase IV bolus CT, which reflects abundant fibroblastic components of the tumor. We report two cases of pathologically confirmed desmoid tumor performed IV bolus CT.

Pulmonary and Respiratory Medicine
CT Findings of Bronchogenic Cyst: Hyun Cheol Cho, Yong Woo Lee, Mi Soo Hwang, Kil Ho Cho, Woo Mok Byun, Jae Ho Cho, Jae Chun Chang; Yeungnam Univ J Med. 1995;12(2):226-236. Published online December 31, 1995; DOI: https://doi.org/10.12701/yujm.1995.12.2.226

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Abstract PDF: We studied to evaluate CT characteristics of bronchogenic cysts. We retrospectively evaluated CT of 11 patients with pathologically proved bronchogenic cyst. Precontrast and postcontrast CT scan was performed in all. We analyzed CT with viewpoints of location, size, attenuation on pre- and postcontrast scan, and calcification. Three of 11 bronchogenic cysts were intrapulmonary in location and eight were located in the mediastinum. Two of 3 intrapulmonary bronchogenic cysts were located in the right lower lobe, and the remaining one was left lower lobe. Intrapulmonary bronchogenic cysts ranged from 6cm to 12cm in diameter (average, 9.7 cm). On Cr, intrapulmonary bronchogenic cysts appeared as thin-wall air cyst, homogenous water attenuation and soft tissue attenuation with air bubble respectively. Mediastinal bronchogenic cysts were located in posterior mediastinum (n=5), superior mediastinum (n=2), middle mediastinum (n=1) respectively. These cysts ranged in size from 3cm to 8cm in diameter (average 5.0 cm). On CT, five showed homogenous water attenuation, two soft tissue attenuation similar to that of muscle, one air-fluid level. Calcification or contrast enhancement was not detected in any cases. On operative findings, all of intrapulmonary bronchogenic cysts contained dirty pus-like material and all of mediastinal bronchogenic cysts contained whitish or yellowish mucus material. Bronchogenic cysts showed homogenous water density in many cases, homogenous soft tissue density, air-fluid level and air-filled cyst. The constellation of CT findings may be helpful in the diagnosis and Differentiation of bronchogenic cyst.

Radiology, Radiotherapy & Diagnostic Imaging
Changes of the Renal Arteries Accordding to Various Embolic Materials: Jae Ho Cho, Kil Ho Cho, Jae Chung Chang, Bok Hwan Park, Dong Sug Kim; Yeungnam Univ J Med. 1995;12(1):96-104. Published online June 30, 1995; DOI: https://doi.org/10.12701/yujm.1995.12.1.96

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Abstract PDF: The transarterial embolization has been widely used to control bleeding. It has a variety of clinical utility; to reduce bleeding on the surgical field, to reduce the size of malignant tumor as a preopearative treatment, to treat arteriovenous malformation or arterial aneurysm as a curative method and to promote life quality of patient with diffuse or multiple hepatocellular carcinoma as a palliative treatment, etc. With the advance of modem technology, various embolic materials have been also developed. However, it has not been fully investigated of histopathologic changes of the embolized organs according to the embolic materials used. This study was undertaken to investigate the histopathologic changes of embolized renal artery in rabbit by various embolic materials, according to each embolic material and to time passed by after embolization. Of the 5 arteries embolized by ethylene vinyl alcohol copolymer (EVAL), one showed abscess formation in embolized kidney. The other 4 allowed to perform further pathologic study: within a week after embolization there was no any specific change in vessels, however, mnimal endothelial hypertrophy was observed following 2 weeks of embolization. Of the 8 renal arteries embolized by N-buthyl-2-cyanoacrylate (Histoacryl), 4 showed total occlusion of the main renal arteries as well as renal infarction, which reflects the strong adhesiveness of Histoacryl to vascular wall. The other 4 showed fibrinoid degeneration in vascular wall within a week. However, further change was not observed thereafter. In all the 5 renal arteries embolized by polyvinyl alcohol (Ivalon), there were infiltration of inflammatory cells along the vessel walls, within one week, which represents vasculitis. They showed some fibrosis with appearance of giant cells in the vessels two months after embolization, respectively. The results suggest that EVAL is useful for the embolization of hypervascular lesion with limited arteriovenous fistula, histoacryl for the curative treatment of the lesion with high blood flow or severe arteriovenous fistula, and Ivalan for palliative treatment of malignant tumor or arteriovenous malformation, respectively.

Radiology, Radiotherapy & Diagnostic Imaging
The cervical spinal fractures : comparison of the sites and incidences according to the causes and the types of the injuries.: Jae Ho Cho, Kil Ho Cho, Woo Mock Byun, Sun Yong Kim, Bok Hwan Park; Yeungnam Univ J Med. 1993;10(1):114-126. Published online June 30, 1993; DOI: https://doi.org/10.12701/yujm.1993.10.1.114

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Abstract PDF: The fractures of the cervical spine are relatively uncommon, but they may cause serious neurologic deficits temporarily or permanently. So, it is very important to treat the patients early by way of exact evaluation for the sites and the mechanisms of the injuries. The authors reviewed retrospectively 188 cervical spinal fractures in 100 patients from Sep. 1984 to Aug. 1990. Commonly involed levels were C5 and C6 in lower cervical level and C2 in upper cervical level and the sites in each spine were body; lamina and odontoid process. The hyperflexion injury was the most common type of the cervical spinal fractures occupying 53% of all cervical fractures and cause more multipe fractures(2.26 fractures/patient) than in hyperextension (1. 68 fractures/patient). In hyperflexion injuries, body, transverse and spinous process were commonly involved but lamina fracture was relatively common in hyperextension injury. The dislocations associated with fractures were developed most commonly in hyperflexion injury and 70% of these were anterior dislocation and the most commonly involved levels were C5-6 and C6-7. In conclusion, hyperflexion injury needs more close examination for the entire spinal levels than injuries of other mechanisms because it results in more severe fractures with or without dislocation and relatively frequent multiple fractures in different levels.

Radiology, Radiotherapy & Diagnostic Imaging
Radiologic findings of mediastinal fibromatosis.: You Song Chang, Jae Ho Cho, Kil Ho Cho, Mee Soo Hwang, Bok Hwan Park; Yeungnam Univ J Med. 1991;8(2):217-221. Published online December 31, 1991; DOI: https://doi.org/10.12701/yujm.1991.8.2.217

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Abstract PDF: The fibromatosis is a rare timorous with local invasion, but is not metastasized distantly. This term should not be applied to nonspecific reactive fibrous proliferations that are part of an inflammatory process of are secondary to injury of hemorrhage and have no tendency toward growth or recurrence. It arises principally from the connective tissue of muscle and overlying fascia or aponeurosis (musculoaponeurotic fibromatosis), and chiefly affects the muscle of shoulder, pelvic girdle, and extremity. The term 'aggressive fibromatosis' is also employed to describe this disease, but it is impossible to predict the clinical course in the individual case. The fibromatosis arising in the mediastinum is very rare, and the report about it is nearly absent. The plain radiography shows merely mass with soft tissue density. The CT demonstrates a poorly defined homogenous or heterogeneous mass, isodense with skeletal muscle on precontrast-images, and slightly hyperdense to muscle on postcontrast-scan. Accurate delineation between the tumor & surrounding tissue is vague or frequently impossible. The authors experienced one case of the mediastinal fibromatosis recently and report the case with review of concerned literature.

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