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Heterogeneous characteristics of Korean patients with dysferlinopathy

Title
Heterogeneous characteristics of Korean patients with dysferlinopathy
Authors
Hyung Jun Park;Ji-Man Hong;Young-Chul Choi;Bum Chun Suh;Il Nam Sunwoo;Seung Min Kim;Ha Young Shin;Gyoung Im Suh
Issue Date
2012
Journal Title
Journal of Korean Medical Science
ISSN
1011-8934
Citation
Journal of Korean Medical Science, Vol.27(4) : 423~429, 2012
Abstract
Dysferlinopathy is caused by mutations in the DYSF gene. To characterize the clinical spectrum, we investigated the characteristics of 31 Korean dysferlinopathy patients confirmed by immunohistochemistry. The mean age of symptom onset was 22.23 ± 7.34 yr. The serum creatine kinase (CK) was highly increased (4- to 101-fold above normal). The pathological findings of muscle specimens showed nonspecific dystrophic features and frequent inflammatory cell infiltration. Muscle imaging studies showed fatty atrophic changes dominantly in the posterolateral muscles of the lower limb. The patients with dysferlinopathy were classified by initial muscle weakness: fifteen patients with Miyoshi myopathy phenotype (MM), thirteen patients with limb girdle muscular dystrophy 2B phenotype (LGMD2B), two patients with proximodistal phenotype, and one asymptomatic patient. There were no differences between LGMD2B and MM groups in terms of onset age, serum CK levels and pathological findings. Dysferlinopathy patients usually have young adult onset and high serum CK levels. However, heterogeneity of clinical presentations and pathologic findings upon routine staining makes it difficult to diagnose dysferlinopathy. These limitations make immunohistochemistry currently the most important method for the diagnosis of dysferlinopathy.
URI

http://ir.ymlib.yonsei.ac.kr/handle/22282913/90887
DOI
10.3346/jkms.2012.27.4.423
Appears in Collections:
1. 연구논문 > 1. College of Medicine > Dept. of Neurology
Yonsei Authors
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