Journal of Yeungnam Medical Science

Bok Hwan Park

24 Articles

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.

Endovascular Treatment of Ruptured Dissecting Basilar Artery Aneurysm: One Case Report: Woo Mok Byun, Bok Hwan Park; Yeungnam Univ J Med. 2007;24(2 Suppl):S636-641. Published online December 31, 2007; DOI: https://doi.org/10.12701/yujm.2007.24.2S.S636

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Abstract PDF: Optimal treatment for ruptured dissecting basilar artery aneurysms in patients presenting with SAH is endovascular method using stent placement and coil embolization. We report a case (52-year-old woman) of ruptured dissecting aneurysm of the basilar artery which was treated with stent placement and coil embolization.

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.

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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4 Crossref

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.

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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

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.

Screening Examination of Breast Cancer: Review of the Recommended Guidelines.: Myung Ho Shin, Mi Soo Hwang, Bok Hwan Park; Yeungnam Univ J Med. 1999;16(2):342-346. Published online December 31, 1999; DOI: https://doi.org/10.12701/yujm.1999.16.2.342

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Abstract PDF: BACKGROUND
Delays in breast cancer diagnosis may occur in young women due to a low index of suspicion. The purpose of this study was to compare mammography and breast sonography in detection of breast cancer and to suggest a reasonable guideline for breast cancer screening examination. MATERIALS AND MATHODS: Among 820 patients, 102 patients were under 35 years and 122 patients were above 60 years of age. We reviewed medical records, mammograms and/or ultrasonography of 49 patients under 35 years and 48 patients above 60 years of age with pathologically-proven breast cancer. Pathological reports were as follows: Invasive ductal carcinoma(IDC) was present 61.2% of patients in the young age group and ductal carcinoma in situ(DCIS) in 16.3%. IDC was present in 66.6% of the patients in the old age group, and DCIS in 8.33%. We analyzed mammography and ultrasonography to evaluate their usefullness in detecting breast cancer in patients under 35 years and over 60 years of age. RESULTS: The mammographic results are as follows: 1) detection rate of lesion: 83.8%(under 35yrs), 100%(over 60yrs) 2) sensitivity of cancer: 67.6%(under 35yrs), 91.2%(over 60yrs) The ultrasonographic results are as follows: 1) detection rate of lesion: 100% 2) sensitivity of cancer: 87.2%(under 35yrs), 96.7%(over 60yrs) The breas cancer detection rate in women under 35 years old was comparable to that of women above 60 years old in our study. CONCLUSION: A striking histologic finding in the two groups was a higher incidence of nuclear Grade II and III tumors. This finding correlates with the reported increased incidence of high grade tumors inyoung women and may correlae with the poorer prognosis of breast cancer in young patients. We conclude that early screening examination is helpful for early detection of breast cancer in women under age 35.

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.

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.

Congenital Midgut Malrotation : Radiological Findings.: Jae Hong An, Mi Soo Hwang, Bok Hwan Park, Jung Kon Koh; Yeungnam Univ J Med. 1997;14(2):393-398. Published online December 31, 1997; DOI: https://doi.org/10.12701/yujm.1997.14.2.393

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Abstract PDF: An accurate early diagnosis of congenital midgut malrotation is essential to prevention of catastrophic effects of volvulus. To evaluate the usefulness of radiologic examinations in diagnosing intestinal malrotation, we retrospectively analyzed radiologic findings and operation records of 17 intestinal malrotation patients, who were radiologically diagnosed. The age range of the patients studied were from 1day to 12years. The presenting symptoms were vomiting, vomiting with abdominal pain, abdominal distention, diarrhea and failure to thrive. The viewpoints of this analysis were the location of duodeno-jejunal flexure on barium meal and cecal location on barium enema. Sixteen of 17 patients, who were radiologically diagnosed, were surgically proven, but one patient with annular pancreas was false positive. In the case of 3 surgically proved patients, malrotation was suspected on barium meal prior to the barium enema, but final diagnosis was determined on barium enema examination. We concluded that a barium enema should be performed on all children with suspected malrotation where the initial upper gastro-intestinal study was normal or suspicious on account of the small incidence of false positive and false negative barium meals.

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.

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.

Use of Sonography in the Differential Diagnosis between Phylloides Tumor and Giant Fibroadenoma.: Jong Oh Choi, Jae Woon Kim, Won Kyu Park, Mi Soo Hwang, Bok Hwan Park; Yeungnam Univ J Med. 1996;13(2):295-301. Published online December 31, 1996; DOI: https://doi.org/10.12701/yujm.1996.13.2.295

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Abstract PDF: Phylloides tumor is very similar to giant fibroadenoma in that they have benign appearance in breast radiologic image. Fibroadenoma has no malignant potential, but phylloides tumor is locally recurrent, invasive and may occasionally metastasize. It thus appears that evaluation of the differential point of the two tumor groups by radiologic study is very important. We retrospectively compared sonographic find;.ngs of 6 cases of phylloides tumor with those of 4 cases of fibroadenoma, which proved pathologically in Ye mgnam University Hospital from 1984 to 1986. The mean age of the patients were 31.8 years old(from 14 to 41 years old) in phylloides tumor and 28.8 years old (from 17 to 40 years old) in giant fibroadenoma, respectively. The viewpoints of this analysis were size, shape and contour of the masses, internal echo pattern, posterior enhancement, and especially the existence of peripheral cyst or septal band echo. We found that diffenentiation of these two tumors by sonography was difficult. But peripheral cyst was found only in phylloides tumor and septal band echo was found largely in giant fibroadenoma. Although the existence of peripheral cyst or septal band echo in the breast mass was not pathognomonic findings, we suggest that the existence of septal band echo is preferential finding to fibroadenoma, and peripheral cyst is preferential finding to phylloides tumor.

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.

Magnetic Resonance Imaging of Uterine Mass.: Bok Hwan Park; Yeungnam Univ J Med. 1995;12(2):163-177. Published online December 31, 1995; DOI: https://doi.org/10.12701/yujm.1995.12.2.163

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Abstract PDF: No abstract available.

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.

Computed tomographic findings of malignant ovarian germ cell tumors: Woo Mok Byun, Kil Ho Cho, Bok Hwan Park; Yeungnam Univ J Med. 1993;10(2):417-422. Published online December 31, 1993; DOI: https://doi.org/10.12701/yujm.1993.10.2.417

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Abstract PDF: Diagnosis of malignant germ cell tumors of the ovary is usually difficult because many ovarian neoplasms have similar clinical and radiologic manifestations. We reviewed retrospectively 12 cases of ovarian malignant germ cell tumor and evaluated with respect to size, mass characteristics on computed tomography for differential diagnosis. Endodermal sinus tumors were mainly cystic mass with some solid component and septations. Immature teratomas showed typical manifestations, such as fatty tissue, calcifications, cysts, and irregular shaped soft tissue densities. Dysgerminoma was mainly solid mass without cystic component, and mixed germ cell tumor showed nonspecific manifestations. All cases were relatively large in size, and young in age. In conclusion, CT findings of malignant germ cell tumors are helpful in differential diagnosis

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.

The analysis of ultrasonographic findings in breast carcinoma.: Jin Wook Lee, Mi Soo Hwang, Bok Hwan Park; Yeungnam Univ J Med. 1992;9(2):269-274. Published online December 31, 1992; DOI: https://doi.org/10.12701/yujm.1992.9.2.269

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Abstract PDF: Authors retrospectively analyzed ultrasonographic findings of 12 cases of breast carcinomas which were proven pathologically at Yeungnam University Hospital from March 1992 to August 1992. Classically, breast carcinomas were described as irregular and lobulated hypoechoic solid masses with inhomogeneous internal echoes and frequent attenuation of the sound beam. And other additional ultrasonographic findings were echogenic rim, disruptions of superficial layer, microcalcification, skin thickening and so on. In our studies, not all of these findings of breast carcinomas were found in each case, but most of these findings were noted. However, several studies have demonstrated considerable overlap in the ultrasonographic appearance of benign lesions and carcinoma. Thus, accurate sonographic determination of the type of solid mass is not possible with current ultrasonographic imaging techniques and criteria. For more accurate diagnosis of breast lesions, sonographic and other imaging techniques are interpreted together.

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.

Treatment of Traumatic Carotid-Cavernous Fistulas using Debrun's Detachable Balloons.: Sang Jin Lee, Son Yong Kim, Mi Soo Hwang, Jae Chun Chang, Bok Hwan Park; Yeungnam Univ J Med. 1989;6(2):91-101. Published online December 31, 1989; DOI: https://doi.org/10.12701/yujm.1989.6.2.91

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Abstract PDF: The goal of therapy in patients with traumatic carotid-cavernous fistulas is to occlude the fistula preferably while maintaining the carotid blood flow. Since the introduction of the concepts of detachable balloon technique to occlude arteriovenous fistulas, the technique has become the treatment of choice in the management of traumatic carotid-cavernous fistulas. The major symptoms of traumatic CCFs are (1) pulsating exophthalmos, (2) orbital and cephalic bruit and murmur, (3) headache, (4) chemosis, (5) extraocular palsies, and (6) visual failure. Traumatic CCFs are combined with multiple associated lesion. We tried the occlusion of fistulas using Goldvalve balloons in 8 consecutive cases of traumatic CCF and the result of our experience is reported. Transarterial approach with manually-tied latex balloons is tried in all cases and the fistulas was successfully occluded in all cases. In 5 cases, the internal carotid artery was preserved and the arterial lumen was occluded along with fistula opening in cases. In one case, surgical ligation was done because of symptoms recurred and incomplete occlusion of fistula. We experienced hemiparesis as a major complication in one case during occlusion tolerance test, which was remitted spontaneously. The results of Debrun balloon treatment were relatively excellent. We consider that the first choice of treatment of traumatic CCF is occlusion of the fistula by a detachable balloons.

CT findings of the Mediastinal tumors.: Ho Son Chung, Sang Jin Lee, Mi Young Son, Hyuk Po Kwon, Mi Soo Hwang, Son Yong Kim, Jae Chun Chang, Bok Hwan Park; Yeungnam Univ J Med. 1989;6(2):79-90. Published online December 31, 1989; DOI: https://doi.org/10.12701/yujm.1989.6.2.79

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Abstract PDF: Computerized Tomography is now well established and important noninvasive method of diagnosting mediastinal mass lesions because of its superior imaging of their size, location and internal composition. Authors analyzed and present CT findings of 30 surgically proven mediastinal tumors and cysts that were studied and treated at the Yeungnam University Hospital during recent 6 years. The most common tumor was thymoma (9 cases), and teratoma (6 cases), lymphoma (6 cases), bronchogenic cyst (4 cases), neurogenic tumor (4 cases), pericardial cyst (1 case) were next in order of frequency. There were 5 cases of thymoma showing homogenous solid density mass, 2 cases were malignant thymoma and myasthenia gravis was present in 2 cases. A case of thymolipoma and a case of thymic carcinoma were included. All teratomas were cystic masses but pathognomonic fat, and calcified density were seen only in 4 cases. 5 cases were located in anterior mediastinum and 1 case was in posterior mediastinum. Lymphoma (3 Hodgkin's and 3 non-Hodgkin's) appeared as irregular lobulated mass in anterior mediastinum. Neurogenic tumor (2 ganglioneuroma and 2 neurilemmoma) appeared as homogenous density mass located in posterior mediastinum. Among the 4 bronchogenic cysts, 2 were located in retrotracheal area, 1 was located in subcarinal and 1 was in parathoracic area. One case of pericardial cyst was oval shaped cystic mass located in left pericardiac border.

Antibacterial Activity of Ceftizoxime Against Gram Negative Enteric Bacteria in vitro and in vivo.: Woo Mok Byun, Jae Chun Chang, Bok Hwan Park, Hee Sun Kim, Sung Kwang Kim; Yeungnam Univ J Med. 1989;6(1):59-68. Published online June 30, 1989; DOI: https://doi.org/10.12701/yujm.1989.6.1.59

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Abstract PDF: Ceftizoxime sodium is a new synthetic β-lactam antibiotic combining potent antibacterial activity with high stability to a wide range of bacterial β-lactamase. This experiment was achieved to evaluate the antibacterial activities of ceftizoxime sodium against. Gram negative enteric bacteria isolated from in outpatient visiting Yeungnam university hospital and to study the emergence of drug induced bacterial variants which resist to ceftizoxime in vitro. The antibacterial activity of the ceftizoxime was compared with that of antibiotics and its effect on population of normal intestinal flora in mice was observed. The results are summarized as follows: 1. Highly effective antibacterial activity of ceftizoxime against Gram negative enteric bacilli was demonstrated and this antibacterial activity was superior to that of ampicillin. 2. Several test strains shows multiple antibiotic resistance. Among 15 strains of Escherichia coli, 1 strain was resistant to ampicillin, cefadroxil, gentamicin, tetracycline, and 2 strains were resistant to ampicillin, cefadroxil, tetracycline, five strains of Escherichia coli and Enterobacter cloacae was resistant to ampicillin, tetracycline and Shigella dysenteriae was resistant to ampicillin, gentamicin, tetracycline. 3. The frequency of in vitro emergence of resistant variants among ceftizoxime sensitive bacteria in the presence of increasing concentrations of the compound was found to be low. 4. Plasmid was isolated in 6 of 9 strains (6 strains of Escherichia coli, Shigella dysenteriae, Enterobacter cloacae and Salmonella typhi). That showed different antibiotic resistance. They were 5 strains of Escherichia coli and 1 strain of Shigella dysenteriae. However, plasmid could not be considered as a hallmark for antibiotic resistance by this Further studies with curing experiment are to be accomplished for this purpose. 5. Changes in the bacterial count of normal intestinal flora following 25 mg/kg/day administration of ceftizoxime over 5 consecutive days were not significant. In conclusion, ceftizoxime appeared to be a drug of choice in the treatment of Gram negative enteric bacilli infection.

Diagnostic Value of Computed Tomography in Acetabular Fracture.: Sun Yong Kim, Bok Hwan Park, Joo Chul Ihn; Yeungnam Univ J Med. 1988;5(1):43-48. Published online June 30, 1988; DOI: https://doi.org/10.12701/yujm.1988.5.1.43

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Abstract PDF: We retrospectively analyzed 22 patients pelvic CT, in whom the acetabular fracture were suspected in plain film. And compared and analyzed the computed tomogram findings and plain radiographic findings. The results were as follows. CT enables better evaluation of shape, extent, and degree of separation of fragment. CT was helpful in detecting the combined fracture and soft tissue injuries. CT showed intraarticular loose bodies, which were invisible on plain film. In patients with pelvic trauma, no necessary changing position during CT examination. CT was useful demonstrates the remnant of intraarticular osseous fragment and adequacy of reduction after surgery.

Radiologic Evaluation of Intraabdomenal Masses in Childhood.: Hyuk Po Kwon, Woo Mok Byun, Mi Soo Hwang, Son Yong Kim, Jae Chun Chang, Bok Hwan Park; Yeungnam Univ J Med. 1988;5(1):33-42. Published online June 30, 1988; DOI: https://doi.org/10.12701/yujm.1988.5.1.33

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Abstract PDF: The abdominal tumors in children are different from those of adult. These tumors are the third most common one, preceded by leukemia and brain tumors, in children under 15 years. X-ray examination is the most important method among diagnostic approaches. The role of diagnostic imaging is to identify the precise anatomic location and extent of pathologic process with the minimal number of imaging procedures. 23 cases of abdominal tumors were reviewed in respect of age incidence, site of origin, radiologic findings. The results are briefly summarized as follows: 1. Neuroblastoma was the most common (6 cases) and wilm's tumor (5 cases), choledocal cyst (4 cases), ovarian mass (3 cases), hydronephrosis (2 cases), were descending order in frequency. 2. The most common site was retroperitoneum (60%) Kidney was the single most common site of origin. 3. Radiologic findings. The most common findings of plain radiography was ill defined soft tissue mass and this method was helpful in the presence of calcification especially in neuroblastoma. Ultrasonographic pattern was anechoic (cystic), echoic or mixed pattern, but this method provide less precise anatomical details, nevertheless Ultrasonography was particularly useful imaging modality for the pediatric abdominal tumors. IVP findings were renal displacement, caliceopelvic system distortion or nonvisualization of kidney, these information was helpful in determining the location of tumors. CT scan showed homogenous or inhomogeneous, cystic or solid, mass with their anatomic location. 4. Ultrasonography was the most widely used specific diagnostic method, but had limited value in detecting the anatomic location of tumors. CT scan was superior to ultrasound for determining the extent of tumors.

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