[Rare forms of panniculitis: subcutaneous sarcoidosis and panniculitis associated with dermatomyositis].

Panniculitides represent heterogenous group of disorders involving subcutaneous fat tissue, and are etiologically related to different causes, including systemic diseases. Two female patients having subcutaneous sarcoidosis and panniculitis associated with dermatomyositis are presented in this paper. The first patient, (38 years of age), was with the nodes on forearms and lower legs, which occurred one month after hypophysectomy for adrenocorticoscopic (ACTH)-secreting pituitary adenoma, and showed histopathologically confirmed epithelioid, noncaseating granulomas in the subcutaneous fat tissue. Laboratory and radiographic findings were normal, with the exception of positive rheumatoid factor and incompletely developed cysts in proximal phalanges of the hand. The second patient (56 years of age), was with subcutaneous nodes on the upper arm and the lateral chest wall, which were noticed several months after the diagnosis of dermatomyositis. Histopathological examination showed lobular pannicilitis with hyaline fibrosis and plasmocytic-lymphocytic infiltrate.