A giant retroperitoneal lipoma presenting as a sciatic hernia: MRI findings

Sciatic hernia is a rare condition and its clinical diagnosis is uneasy.Herniation of pelvic organs as well as of retroperitoneal neoplasm has been reported in the literature. Sciatica occurs as a result of compression of the sciatic nerve by the herniated sac. We present a case of retroperitoneal lipoma in a patient who had lower leg complaint and describe the imaging findings.