Spindle cell lipoma. An unusual dermatologic presentation

A 30-year-old woman had nontender subcutaneous mass over the left temple that histologically demonstrated a mixed pattern of mature lipocytes and spindle cells, many in a palisading and fascicular pattern, separated by fibrous trabeculations. No cellular atypia or increased mitotic activity was seen, and a predominance of mast cells was noted. This case illustrates the spindle cell lipoma, a benign variant of lipoma that has been confused in the past with both malignant spindle cell and lipocytic tumors. Our case, although atypical in sex, age, and location, serves to identify this entity in the dermatologic literature.