Retroperitoneal benign cystic teratoma in adult.

A rare case of retroperitoneal benign cystic teratoma in a 23 year-old woman was reported. She presented with abdominal discomfort for 2 weeks. The mass was in the right upper quadrant of the abdomen and at surgery, was found to adhere to the inferior vena cava and left renal vein. The characteristic features detected by ultrasonography and computed tomography were emphasized.