Yeungnam Univ J Med.  2017 Jun;34(1):137-139. 10.12701/yujm.2017.34.1.137.

Dermatomyositis sine dermatitis, a rare phenotype of idiopathic inflammatory myopathy

• Park JS
• Park JY

• KMID: 2400346
• DOI: http://doi.org/10.12701/yujm.2017.34.1.137

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.

Keyword

Dermatomyositis; Sine dermatitis; Skin manifestation; Perifascicular atrophy; Diagnostic criteria

MeSH Terms

Atrophy
Complement Membrane Attack Complex
Dermatitis*
Dermatomyositis*
Diagnosis
Extremities
Myositis*
Phenotype*
Skin Manifestations
Complement Membrane Attack Complex