title: Antenatal ultrasonographic appearance of a cloacal anomaly.
abstract: BACKGROUND
  Cloacal anomalies are rare abnormalities with highly variable forms, which makes them difficult to diagnose antenatally. We present a cloacal anomaly case with interesting antenatal ultrasonographic findings.
  
  
  METHODS
  A 24-year-old woman, gravida 1, para 0, presented at 23 weeks' gestation with ultrasonographic evidence of fetal ascites. Between 23 and 30 weeks' gestation, serial ultrasounds showed changing features of a cloacal anomaly, consisting of fetal ascites, a cystic pelvic mass, hydronephrosis, and oligohydramnios.
  
  
  CONCLUSIONS
  Serial antenatal ultrasound helped diagnose changing features of a cloacal anomaly in our case, thus allowing directed antenatal counseling and appropriate perinatal treatment.
authors.affiliation: Department of Obstetrics and Gynecology, Toyohashi Municipal Hospital, Toyohashi, Japan.
authors.forename: Y
authors.initials: Y
authors.lastname: Ohno
authors.forename: N
authors.initials: N
authors.lastname: Koyama
authors.forename: M
authors.initials: M
authors.lastname: Tsuda
authors.forename: Y
authors.initials: Y
authors.lastname: Arii
mesh_terms: D000328:Adult; D001201:Ascites / Q000000981:diagnostic imaging; D002988:Cloaca / Q000002:abnormalities*; D005260:Female; D005315:Fetal Diseases / Q000000981:diagnostic imaging; D006801:Humans; D011247:Pregnancy; D011262:Pregnancy Trimester, Second; D011263:Pregnancy Trimester, Third; D016216:Ultrasonography, Prenatal