title: Resolution of hydrops fetalis in congenital cystic adenomatoid malformation after prenatal steroid therapy.
abstract: OBJECTIVE
  Development of hydrops fetalis in fetuses with congenital cystic adenomatoid malformations (CCAM) is a significant risk factor for fetal or neonatal demise. In rare cases, resolution of CCAM has occurred, presumably owing to lesion maturation or involution. Steroid therapy, utilized for lung maturity, has been postulated to accelerate this process. The natural history of hydropic fetuses with CCAM after receiving steroid therapy is presented.
  
  
  METHODS
  The authors prospectively followed up with 3 patients who had antenatally diagnosed CCAM and nonimmune hydrops fetalis with predicted mortality. All patients declined or were not candidates for fetal intervention and were treated with standard prenatal betamethasone to increase lung maturity.
  
  
  RESULTS
  Three fetuses had CCAM and nonimmune hydrops fetalis diagnosed prenatally. After a course of prenatal steroids during the second trimester, all 3 patients had resolution of their hydrops and were delivered at term without respiratory distress.
  
  
  CONCLUSIONS
  Nonimmune hydrops fetalis in fetuses with congenital cystic adenomatoid malformation is a harbinger for fetal demise. The resolution of hydrops in these patients after receiving steroid therapy is an interesting and compelling observation. Because the mechanism of this process is speculative, further studies are needed to elucidate the relationship between antenatal steroids and maturation of congenital cystic adenomatoid malformation.
authors.affiliation: Fetal Treatment Center, Division of Pediatric Surgery, Department of Surgery, University of California, San Francisco, California 94143-0570, USA.
authors.forename: KuoJen
authors.initials: K
authors.lastname: Tsao
authors.forename: Samuel
authors.initials: S
authors.lastname: Hawgood
authors.forename: Lan
authors.initials: L
authors.lastname: Vu
authors.forename: Shinjiro
authors.initials: S
authors.lastname: Hirose
authors.forename: Roman
authors.initials: R
authors.lastname: Sydorak
authors.forename: Craig T
authors.initials: CT
authors.lastname: Albanese
authors.forename: Diana L
authors.initials: DL
authors.lastname: Farmer
authors.forename: Michael R
authors.initials: MR
authors.lastname: Harrison
authors.forename: Hanmin
authors.initials: H
authors.lastname: Lee
mesh_terms: D000328:Adult; D001623:Betamethasone / Q000627:therapeutic use*; D015615:Cystic Adenomatoid Malformation of Lung, Congenital / Q000150:complications / Q000000981:diagnostic imaging / Q000188:drug therapy*; D004341:Drug Evaluation; D005260:Female; D005313:Fetal Death / Q000517:prevention & control; D005325:Fetal Organ Maturity / Q000187:drug effects; D005500:Follow-Up Studies; D006801:Humans; D015160:Hydrops Fetalis / Q000000981:diagnostic imaging / Q000188:drug therapy* / Q000209:etiology; D008168:Lung / Q000196:embryology; D011247:Pregnancy; D012074:Remission Induction; D016896:Treatment Outcome; D016216:Ultrasonography, Prenatal
chemical_list: D001623:Betamethasone