title: Fetiform teratoma (homunculus).
abstract: Fetiform teratoma (homunculus) is a term that has been given to a rare form of ovarian teratoma that resembles a malformed fetus. There are very few reported cases of this entity in the English language literature. In this report, we document a case of fetiform teratoma in a 23-year-old woman, gravida 0, who initially presented with a chief complaint of dyspareunia. The clinical and pathologic aspects of this rare entity are presented here, with a review of the English literature. Differentiating fetiform teratoma from the more highly developed fetus-in-fetu and ectopic pregnancy is also discussed.
authors.affiliation: Department of Pathology, Evanston Hospital, Evanston, Ill 60201, USA.
authors.forename: Jason R
authors.initials: JR
authors.lastname: Weiss
authors.forename: Jeanette R
authors.initials: JR
authors.lastname: Burgess
authors.forename: Keith J
authors.initials: KJ
authors.lastname: Kaplan
mesh_terms: D000328:Adult; D000013:Congenital Abnormalities / Q000175:diagnosis; D003937:Diagnosis, Differential; D004414:Dyspareunia / Q000209:etiology; D005260:Female; D005333:Fetus / Q000002:abnormalities*; D006801:Humans; D008279:Magnetic Resonance Imaging; D010051:Ovarian Neoplasms / Q000150:complications / Q000175:diagnosis* / Q000000981:diagnostic imaging / Q000473:pathology; D011859:Radiography; D013724:Teratoma / Q000150:complications / Q000175:diagnosis* / Q000000981:diagnostic imaging / Q000473:pathology; D014463:Ultrasonography