A case of retroperitoneal liposarcoma presented as a bulging mass in the right inguinal area

Abstract

A 27-year-old male developed a swelling in his right inguinal area, and was as having a right inguinal hernia. However, during surgery, only a lipoma was found ; there was no hernial sac. The lipoma was excised. A right inguinal swelling presented again 10 months later, and he was readmitted 14 months after the initial operation. A right inguinal hernia was diagnosed because the lesion enlarged on standing. An operation was done. A hernia sac was not found during surgery. A lipoma was found that protruded through the internal inguinal ring at the lateral aspect of the cold. It was resected. On pathology, a well-differentiated liposarcoma was diagnosed. Abdominal enhanced CT showed that the mass extended from the inferior pole of the right kidney to the inguinal area. A retroperitoneal liposarcoma was diagnosed ; it was removed. Retroperitoneal liposarcoma presenting as an inguinal swelling is rare. In fact, only 7 cases including the present case have been reported in Japan. We report a rare case of a liposarcoma presenting as an inguinal swelling.