Müllerian cyst of the retroperitoneum.
D000293:Adolescent; D003560:Cysts / Q000175:diagnosis / Q000000981:diagnostic imaging / Q000473:pathology; D004622:Embryo, Mammalian; D005260:Female; D006801:Humans; D009095:Mullerian Ducts; D011247:Pregnancy; D011859:Radiography; D012187:Retroperitoneal Space; D014566:Urogenital System / Q000196:embryology*