title: Case report: sacral parasitic twins.
abstract: BACKGROUND
  Sacral parasitic twins originate from one fertilized ovum and they have one placenta and the same sex.
  
  
  METHODS
  A 23-year-old woman was referred to our clinic. Examination by touch revealed a mass that was in the sacral region but the borders could not be fully examined. The solid mass, which was conjoined to the sacrum, had a soft texture. The infant's appearance was macroscopically normal. When the mass was examined by palpation, there were structures which felt like extremities. The mass was 20 x 11 x 9 cm in size.
  
  
  CONCLUSIONS
  The differential diagnosis should include sacrococcygeal teratoma. In our case the differential diagnosis was done by histopathologic findings. This case, which involved a tumoral formation at the sacral region in the antenatal period, was detected during delivery. A sacral parasite is a rarely seen phenomenon and as such the diagnostic information of this case could be useful.
authors.affiliation: Gynecology Clinic, Agri Maternity and Children Hospital, Agri, Turkey. opdrmustafakara@hotmail.com
authors.forename: M
authors.initials: M
authors.lastname: Kara
authors.forename: E
authors.initials: E
authors.lastname: Ylmaz
authors.forename: I
authors.initials: I
authors.lastname: Eminli
authors.forename: E
authors.initials: E
authors.lastname: Töz
authors.forename: I
authors.initials: I
authors.lastname: Avc
authors.forename: T
authors.initials: T
authors.lastname: Oge
authors.forename: E
authors.initials: E
authors.lastname: Ciğercioğullari
mesh_terms: D000328:Adult; D002585:Cesarean Section; D036861:Delivery, Obstetric; D004630:Emergencies; D017809:Fatal Outcome; D005260:Female; D006801:Humans; D007231:Infant, Newborn; D012445:Sacrococcygeal Region; D014428:Twins, Conjoined / Q000473:pathology*