Primary retroperitoneal liposarcoma with osseous metaplasia: A peculiar presentation mimicking a calculous non-functioning kidney

Abstract

Liposarcomas are rare tumors of the retroperitoneum, and their clinical findings are related with their location and size. in this report, we preseni a case of primary retroperitoneal liposarcoma with osseous metaplasia, that preoperatively resembled a coraliform stone in a non-functioning kidney.