Extrarenal Angiomyolipoma :Report of a Mediastinal Case and Review of the Literature
A mediastinal angiomyolipoma was excised from a 17-year-old man. It was composed of capillaries and cavernous hemangioma-like vessels, smooth muscle cells and mature fat cells. The histology was somewhat different from that of ordinary renal angiomyolipoma. Extrarenal angiomyolipoma has been also reported under other terms. It seems extremely rare. To our knowledge, only 22 cases of such examples have been reported in English literature. Here, we present our case with histological comparisons between renal and extrarenal varieties. A possible histogenesis is also discussed.