Extramuscular subcutaneous fibrolipoma containing foci of striated muscle cells: a hitherto unreported condition.

Lipoma of the cutaneous region is very common tumor. Most of cutaneous lipoma arises in the subcutaneous adipose tissue. When the tumor is composed exclusively mature lipocytes, the tumor is referred to as lipoma. When the tumor contains areas of capillary, it is called angiolipoma. When the tumor has rich fibrous tissue, it is called fibrolipoma. When the tumor consisted of spindle cells, it is called spindle cell lipoma. When the tumor is located in the striated muscles, it is called intramuscular lipoma. When the tumor contains areas of lipoblasts, it is called atypical lipomatous tumor (well differentiated liposarcoma). Lipoma containing striated muscle cells has not been reported. Herein reported is an extremely rare case of fibrolipoma containing areas of striated muscle cells.