Retroperitoneal liposarcoma presented as inguinoscrotal mass: Case Report

Abstract

Liposarcoma is one of the most common soft tissue sarcoma. About 20% of liposarcomas originate in the retroperitoneum. It manifests as painless, slowly enlarging soft tissue mass. Inguinal region is one of the uncommon locations for liposarcoma, the tumour arising from the spermatic cord. Very rarely retroperitoneal liposarcoma may manifests as inguinal hernia. We describe case of a 60 years old man who presented with right inguino-scrotal mass that was demonstrated to be solid enhancing fat attenuation mass with small areas of soft tissue attenuation inside on multi-detector-row computed tomography (MDCT). Coronal reformatted CT revealed dumbbell shape mass with larger retroperitoneal component contiguous with smaller right para-testicular component across a narrow segment in the inguinal canal. Patient was operated and a large retroperitoneal mass was removed. Histopathology of the resected mass revealed a well differentiated liposarcoma. Thus, firm, non-tender and large irreducible inguinoscrotal swelling in an adult should be evaluated by CT to rule out a rare inguinal extension of retroperitoneal liposarcoma. MDCT, besides revealing the diagnosis can determine the true intra-abdominal (retroperitoneal) extent of such a dumbbell shaped tumour when only tip of iceberg is visible in the inguinal region.