Contributor: Gordon K. Klintworth
The angiolipoma is a variant of the lipoma. It is a small tumor composed of mature adipose connective tissue and an admixure of dilated capillaries. Some capillaries may contain fibrin thrombi. The tumor most often occurs in subcutaneous tissue and is usually small (1-3 cm in diameter). It is occasionally painful. Angiolipomas are an manifestation of  familial angiolipomatosis [angiolipomatosis - familial]. An angiofibroma may be hypercellular and need to be differentiated from a sarcoma.