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Yeungnam Univ J Med > Volume 34(1); 2017 > Article
Yeungnam University Journal of Medicine 2017;34(1):137-139.
DOI: https://doi.org/10.12701/yujm.2017.34.1.137    Published online June 30, 2017.
Dermatomyositis sine dermatitis, a rare phenotype of idiopathic inflammatory myopathy
Jin Sung Park, Ji Young Park
1Department of Neurology, Kyungpook National University School of Medicine, Daegu, Korea.
2Department of Pathology, Kyungpook National University School of Medicine, Daegu, Korea. neurojspark@gmail.com
Abstract
Dermatomyositis (DM) is characterized by progressive proximal limb weakness and typical skin manifestations. The histological findings that show perifascicular atrophy and deposition of membrane attack complex are pathognomic features of DM. Dermatomyositis is categorized into classical DM and non-classical DM, which includes amyopathic DM and DM sine dermatitis. DM sine dermatitis is seldom described because of its rarity, making the diagnosis more challenging. We report a case of DM sine dermatitis, a rare phenotype of DM.
Key Words: Dermatomyositis, Sine dermatitis, Skin manifestation, Perifascicular atrophy, Diagnostic criteria
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