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Osteochondrolipoma: a lipoma with cartilaginous and osseous differentiation of the ischium.

Osteochondrolipoma is an extremely rare histological variant of lipoma with osseous and chondroid differentiation, which occurs mostly in the head and neck area and the upper half of the body. In this paper, we present a case of osteochondrolipoma, which displayed components of both cartilage and bone in lipoma, located on the right side of the ischium of a 31-year-old male. On thorough review of literature, no such site has been reported to date. Peculiarities of this case and the diagnostic challenges are discussed.