title: Abdominal mass: "fetus in fetu".
abstract: A female newborn presented a mass in the left upper abdominal quadrant. It was removed by surgery and contained two independent fetuses. Dissection and radiological study of the fetuses showed an axial skeleton and long bones. It corresponds to the generally recognized diagnostic criteria of fetus in fetu.
authors.affiliation: Department of Pediatric Surgery, Children's Hospital, La Paz, Madrid, Spain.
authors.forename: M J
authors.initials: MJ
authors.lastname: Martínez-Urrutia
authors.forename: P
authors.initials: P
authors.lastname: López Pereira
authors.forename: L
authors.initials: L
authors.lastname: Lassaletta
authors.forename: R
authors.initials: R
authors.lastname: Gracia
authors.forename: J
authors.initials: J
authors.lastname: Utrilla
mesh_terms: D000005:Abdomen; D009008:Abnormalities, Severe Teratoid / Q000000981:diagnostic imaging*; D005260:Female; D006801:Humans; D007231:Infant, Newborn; D011859:Radiography; D014310:Triplets