1990 Volume 51 Issue 4 Pages 763-767
We report a case of lipoma of the retroperitoneum, which is so rare that only about 60 cases have been reported in Japan so far. A 22-years-old woman was seen with the complaint of right hypochondral discomfort. Since the graphic studies including computed tomography and ultrasonography made a diagnosis of lipoma of the retroperitoneum, the tumor was resected. Histopathologically it was a lipoma. Lipoma of the retroperitoneum is easily diagnosed by echography or CT, but has difficulties in treating, because it is possibly accompanied by recurrence and a morphorogical change to sarcoma. On resection of lipomas, surgeons should pay attentions for these possibilities.