Retroperitoneal neurilemoma.
D000328:Adult; D000368:Aged; D001201:Ascites / Q000150:complications; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D009442:Neurilemmoma / Q000098:blood supply / Q000601:surgery*; D011183:Postoperative Complications; D011878:Radiotherapy; D012186:Retroperitoneal Neoplasms / Q000098:blood supply / Q000473:pathology / Q000601:surgery*