Steatocystoma multiplex presenting as asymptomatic nodules on back

Abstract

Asymptomatic nodules of long duration on back are always a diagnostic dilemma. Steatocystoma multiplex is a rare condition, characterized by presence of multiple dermal cysts containing sebum and lined by the epithelium with sebaceous follicles. In the present case, nodules started on the upper back and gradually spread to involve shoulder and upper chest region. There was no history of any systemic complaints. Examination revealed multiple skin-colored nontender nodules. Histopathology from the nodule showed hyperkeratosis and follicular plugging. A large cyst lined by flattened squamous epithelium with atrophic sebaceous units was seen deep in the dermis.