A case of nodular cystic fat necrosis with systemic lupus erythematosus presenting the multiple subcutaneous nodules on the extremities

An Extraordinary Manifestation of Nodular Cystic Fat Necrosis

Nodular cystic fat necrosis (NCFN) is characterized by mobile subcutaneous nodules composed of necrotic adipocytes encapsulated by fibrous tissue. The classical presentation of NCFN is solitary or multiple, up to 40, discrete nodules scattered usually on the extremities or trunk. Here, the authors present an elderly woman who developed an unusual and striking clinical picture of NCFN, two months after a fall. The patient had a large indurated plaque and subcutaneous nodule with superposing necrotic ulcers. During debridement of the ulcers, nearly 100 small nodules popped up freely along with a brownish discharge. Deep in the ulcer, the authors discovered a dislocated nail that belongs to an old hip prosthesis. Histopathological findings of the nodules were compatible with NCFN.

Nodular cystic fat necrosis with calcification in a patient with juvenile dermatomyositis

Nodular cystic fat necrosis is a rare, benign form of encapsulated fat necrosis with distinct histology, characterized by cystic fat necrosis with lipomembranous changes and, in later stages, calcification. We report the case of a 7-year-old child with juvenile dermatomyositis who presented with three asymptomatic, firm, mobile nodules on the arms and neck. Histology was consistent with nodular cystic fat necrosis with prominent calcification. This is an unusual presentation of this entity because it has never been previously reported in association with juvenile dermatomyositis.