title: Foetus in foetu--a case report.
abstract: A three-month old baby presented to the Paediatric Department with a problem of abdominal distension. Clinically, he had a large right abdominal mass which on investigations suggested a teratomatous lesion. At operation, a foetus-like tumour mass was located in the retroperitoneal space. A diagnosis of foetus in foetu was made. A close differential of a retroperitoneal teratoma is discussed and comparison with confirmed cases made.
authors.forename: H
authors.initials: H
authors.lastname: Ng
authors.forename: K P
authors.initials: KP
authors.lastname: Tan
mesh_terms: D000008:Abdominal Neoplasms / Q000175:diagnosis* / Q000000981:diagnostic imaging / Q000473:pathology; D003937:Diagnosis, Differential; D005333:Fetus / Q000000981:diagnostic imaging / Q000473:pathology*; D006801:Humans; D007223:Infant; D008297:Male; D011859:Radiography; D012186:Retroperitoneal Neoplasms / Q000175:diagnosis / Q000000981:diagnostic imaging / Q000473:pathology; D013724:Teratoma / Q000175:diagnosis* / Q000000981:diagnostic imaging / Q000473:pathology; D014427:Twins