Foetus in foetu.
D002648:Child; D000013:Congenital Abnormalities / Q000000981:diagnostic imaging; D005260:Female; D005315:Fetal Diseases / Q000000981:diagnostic imaging*; D006801:Humans; D008297:Male; D011247:Pregnancy; D011859:Radiography; D012186:Retroperitoneal Neoplasms / Q000000981:diagnostic imaging*; D013724:Teratoma / Q000000981:diagnostic imaging*