Osteolipoma: radiological, pathological, and cytogenetic analysis of three cases.

Osteolipoma is a rare variant of lipoma consisting of mature adipose tissue and mature lamellar bone. The presence of non-fatty elements may lead to a wide differential diagnosis on radiology including benign and malignant lipomatous and nonlipomatous entities. The pathological diagnosis is also confounded by the presence of heterologous differentiation. Fortunately, most lipomas harbor classic cytogenetic aberrations, and the finding of translocations involving 12q13-15 may aid in the correct diagnosis. We report three cases of osteolipoma with radiological, histological, and cytogenetic correlation.