Large liposarcoma developing in the ischiorectal fossa: Report of a rare case.

INTRODUCTION We herein report an extremely rare case of a liposarcoma developing in the ischiorectal fossa that was completely resected using a transsacral approach. PRESENTATION OF CASE A 74-year-old man was admitted to our institute because of a large perianal tumor. A pelvic magnetic resonance imaging (MRI) revealed an 8cm×7cm×5cm sized encapsulated… (More)