title: Mature teratoma arising from an intra-abdominal undescended testis presenting as a fetal abdominal mass.
abstract: Teratoma of the intra-abdominal testis is a rare finding in infants. We describe the case of a full-term newborn treated for a calcified abdominal mass which was observed unexpectedly on prenatal sonography. An undescended right testis was also noted. During laparotomy, a twisted retroperitoneal tumor was found just above the right deep inguinal ring. Histological analysis revealed a mature teratoma of the intra-abdominal right testis. The tumor was removed and there was no recurrence at follow-up 1 year later. A teratoma should be considered in cases of fetal abdominal mass, especially when the testes cannot be detected in the scrotum by the 8th month. Prenatal sonographic diagnosis might be possible.
authors.affiliation: Department of Pediatrics, National Taiwan University Hospital, Taipei.
authors.forename: H H
authors.initials: HH
authors.lastname: Shih
authors.forename: R J
authors.initials: RJ
authors.lastname: Teng
authors.forename: K I
authors.initials: KI
authors.lastname: Yau
authors.forename: H H
authors.initials: HH
authors.lastname: Lin
authors.forename: F J
authors.initials: FJ
authors.lastname: Hsieh
authors.forename: C C
authors.initials: CC
authors.lastname: Chen
mesh_terms: D000328:Adult; D003456:Cryptorchidism / Q000150:complications / Q000000981:diagnostic imaging* / Q000601:surgery; D003937:Diagnosis, Differential; D018572:Disease-Free Survival; D005260:Female; D005315:Fetal Diseases / Q000000981:diagnostic imaging* / Q000601:surgery; D006801:Humans; D007231:Infant, Newborn; D007813:Laparotomy; D008297:Male; D011247:Pregnancy; D013724:Teratoma / Q000150:complications / Q000000981:diagnostic imaging*; D013736:Testicular Neoplasms / Q000150:complications / Q000000981:diagnostic imaging* / Q000601:surgery; D016216:Ultrasonography, Prenatal