title: Fetus-in-fetu: a rare entity.
abstract: Fetus-in-fetu is a malformed parasitic monozygotic diamniotic twin that is found inside the body of the living child or adult. A 3-year-old male child presented with a retroperitoneal mass, which on radiological examination showed retroperitoneal teratoma. Pathological examination revealed fetus-in-fetu with partially developed vertebral column.
authors.affiliation: Department of Pathology, Government Medical College, Chandigarh, India. drharshmohan@yahoo.com
authors.forename: Harsh
authors.initials: H
authors.lastname: Mohan
authors.forename: Seema
authors.initials: S
authors.lastname: Chhabra
authors.forename: Uma
authors.initials: U
authors.lastname: Handa
mesh_terms: D002675:Child, Preschool; D003937:Diagnosis, Differential; D005333:Fetus / Q000002:abnormalities*; D006801:Humans; D008297:Male; D012186:Retroperitoneal Neoplasms / Q000175:diagnosis / Q000473:pathology / Q000601:surgery; D013724:Teratoma / Q000175:diagnosis / Q000473:pathology / Q000601:surgery; D014428:Twins, Conjoined / Q000473:pathology* / Q000601:surgery; D014430:Twins, Monozygotic