Retroperitoneal teratomata.
D006801:Humans; D007231:Infant, Newborn; D007232:Infant, Newborn, Diseases; D008297:Male; D011859:Radiography; D012186:Retroperitoneal Neoplasms / Q000000981:diagnostic imaging / Q000473:pathology; D013724:Teratoma / Q000000981:diagnostic imaging / Q000473:pathology