title: Prenatally diagnosed retroperitoneal fetus-in-fetu with ipsilateral testicular atrophy: a case report.
abstract: We report a case of prenatally diagnosed Fetus-in-fetu (FIF) residing in the left retro-peritoneum in a 2-week-old neonate which was also associated with ipsilateral testicular atrophy. A comparison of features differentiating FIF from a retroperitoneal teratoma, and various theories of origin of FIF are described. The causal relationship of ipsilateral atrophic testis with FIF in this case is also discussed.
authors.affiliation: Department of Pediatric Surgery, Maulana Azad Medical College, New Delhi-110002.
authors.forename: Shalini
authors.initials: S
authors.lastname: Sinha
authors.affiliation: Department of Pediatric Surgery, Maulana Azad Medical College, New Delhi-110002.
authors.forename: Yogesh Kumar
authors.initials: YK
authors.lastname: Sarin
authors.forename: Nita
authors.initials: N
authors.lastname: Khurana
keywords: Fetus-in-fetu; parasitic twin; teratoma; testicular atrophy