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JYMS : Journal of Yeungnam Medical Science

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Seung Yeop Lee 4 Articles
Diagnostic Sensitivity of Several Muscles in Repetitive Nerve Stimulation Test for Myasthenia Gravis.
Hyun Jic Kim, Sung Hwan Lim, Seung Yeop Lee, Jung Sang Hah, Wook Nyeon Kim
Yeungnam Univ J Med. 2001;18(2):277-286.   Published online December 31, 2001
DOI: https://doi.org/10.12701/yujm.2001.18.2.277
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BACKGROUND
This study was undertaken to evaluate the diagnostic sensitivity of several muscles in repetitive nerve stimulation test (RNST) for myasthenia gravis (MG) patients. MATERIALS AND METHODS: The study population consisted of 39 MG patients classified by modified Ossermann's classification. Using Stalberg's method, RNST was systematically performed in facial (orbicularis oculi and nasalis) and upper extremity (flexor carpi ulnaris, abductor digiti quinti and anconeus) muscles. RESULTS: The significant electrodecremental response of RNST were noted in orbicularis oculi (58.9%), nasalis (51.3%), flexor carpi ulnaris (42%), anconeus (41%) and abductor digiti quinti muscles (27%). Among the 3 muscles of upper extremity (abductor digiti quinti, flexor carpi ulnaris and anconeus), the positive electrodecremental response of anconeus muscles was significantly higher than other two muscles (p<0.05) in type IIa, IIb and there were no statistical differences of the positive electrodecremental response between orbicularis oculi and nasalis muscles. The facial muscles showed more prominent decremental responses than upper extremity muscles in type I MG(p<0.05). In type IIa MG patients, there were no significant statistical differences between facial and upper extremity muscles but significant statistical differences among upper extremity muscles. In type IIb MG patients, there were no significant statistical differences in all tested muscles in spite of the increased positive electrodecremental response of RNST. CONCLUSION: On the basis of this study, RNST would be initially performed for the orbicularis or nasalis in type I MG and for the anconeus in type IIa or IIb MG.
A Case of Leber's Hereditary Optic Nouropathy Showing 11778 Point Mutation of Mitochondrial DNA.
Yun Seok Jung, Seung Kwon Park, Seung Yeop Lee, Jung Sang Hah, Mee Yeoung Park, Se Jin Lee, Jun Lee
Yeungnam Univ J Med. 1999;16(1):114-118.   Published online June 30, 1999
DOI: https://doi.org/10.12701/yujm.1999.16.1.114
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Leber's hereditary optic neuropathy(LHON) is an optic nerve disease that causes blindness and is associated with maternally inherited mitochondrial DNA(mt DNA) mutations. The most common mitochondrial DNA mutation among LHON patients is a point mutation at the nucleotide 11778 in the subunit 4 of complex I. In one 45-year old male LHON patient with bilateral optic neuropathy, we investigated the presence of a point mutation of mitochondrial DNA and identified a single guanine to adenine transition mutation in the mitochondrial DNA at nucleotide point 11778.
A case of primary antiphospholipid antibody syndrome showing vegetation on the mitral valve through echocardiography.
Seung Yeop Lee, Seung Kwon Park, Sung Hwan Yun, Yun Seok Jung, Hyen Jik Kim, Sung Hwan Lim, Jung Sang Hah, Wook Nyeun Kim
Yeungnam Univ J Med. 1998;15(2):350-358.   Published online December 31, 1998
DOI: https://doi.org/10.12701/yujm.1998.15.2.350
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Antiphospholipid antibody syndrome(APS) is a well-known clinical syndrome characterized by recurrent arterial or venous thromboses, recurrent fetal loss, thrombocytopenia, together with high titers of sustained anticardiolipin antibody(aCL) or lupus anticoagulant(LA). Although systemic lupus erythematosus(SLE) and APS may coexist, a high proportion of patients manifesting the APS do not suffer from classical lupus or other connective tissue disease. The patient has been defined as having a primary antiphospholipid antibody syndrome. We experienced one case of primary APS with recurrent fetal loss, recurrent cerebral infarctions, positive anticardiolipin antibody IgG and fluttering vegetation on the mitral valve, without other connective tissue diseases including SLE. Forty-three old female had 2 out of 11 criteria for the diagnosis of SLE, such as thrombocytopenia and positive antinuclear antibody, but did not meet whole criteria. The patient was treated with ticlopidine, and anticoagulant therapy was recommended.
Comparison of Usefulness of Laboratory Tests in Diagnosis of Myasthenia Gravis.
Seung Kwon Park, Hyun Cheol Do, Min Jung Kim, Seung Yeop Lee, Mee Yeoung Park, Jung Sang Hah, Wook Nyeun Kim, Jun Lee
Yeungnam Univ J Med. 1998;15(1):125-134.   Published online June 30, 1998
DOI: https://doi.org/10.12701/yujm.1998.15.1.125
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PURPOSE: This study was undertaken to evaluate the clinical usefulness of Tensilon test, repetitive nerve stimulation test(RNST), single fiber EMG(SFEMG) test and acetylcholine receptor antibody(AchR Ab) assay for making diagnosis of myasthenia gravis(MG). METHOD: These tests were performed in 21 MG patients which were classified into 11 ocular, 5 mild generalized, 4 moderate generalized, and 1 chronic severe MG. RESULT: The overall positivity of Tensilon test, SFEMG and AchR Ab was 95%, 87%, and 76% respectively. The overall positivity of RNST was 67%; 38% on flexor carpi ulnaris, 43% on adductor digiti quinti and 62% on orbicularis oculi muscles. The positivity of each test was higher in generalized MG group than in ocular MG group. But we could observe the statistically significant difference only in the RNST(p<0.05). CONCLUSION: Tensilon test showed the highest positivity in all MG groups. So we would like to recommend the Tensilon test for the diagnosis of MG at first, followed by RNST and AchR Ab assay, and SFEMG would be indicated to MG group which showed relatively low postivity in other tests.

JYMS : Journal of Yeungnam Medical Science