title: Fetus-in-fetu form of monozygotic twinning with retroperitoneal teratoma.
abstract: One of the commonest defects of blastogenesis is monozygotic twinning resulting in separate or conjoint twins, the latter including a category of internal, "endoparasitic," or fetus-in-fetu twins. We report the third known instance of endoparasitic twinning associated with a benign teratoma at age 1. The host, twin, and teratoma were monozygotic by DNA analysis.
authors.affiliation: Department of Pathology, University of South Florida, and Tampa General Hospital, 33601, USA. egilbert@tgh.org
authors.forename: Enid
authors.initials: E
authors.lastname: Gilbert-Barness
authors.forename: John M
authors.initials: JM
authors.lastname: Opitz
authors.forename: Diane
authors.initials: D
authors.lastname: Debich-Spicer
authors.forename: Thomas
authors.initials: T
authors.lastname: Mueller
authors.forename: Sonya R
authors.initials: SR
authors.lastname: Arnold
authors.forename: Reuben
authors.initials: R
authors.lastname: Quintero
mesh_terms: D005260:Female; D005315:Fetal Diseases / Q000503:physiopathology*; D006801:Humans; D007223:Infant; D007231:Infant, Newborn; D013724:Teratoma / Q000503:physiopathology*; D014430:Twins, Monozygotic