title: Anti-C(w) alloimmunization presenting as hydrops fetalis.
abstract: C(w) is a low frequency red cell antigen that belongs to the Rh blood groups system. While not uncommon, anti-C(w) is rarely associated with clinically significant haemolytic disease of the newborn (HDN). When it does occur, it is often subclinical or of mild to moderate clinical severity. In the majority of pregnancies it is considered to be a naturally occurring antibody and has not been reported to cause hydrops fetalis or stillbirth. We report a case of anti-C(w) alloimmunization, which was associated with significant anaemia and hydrops fetalis, presenting at 35 wk gestation.
  
  
  CONCLUSIONS
  Pregnancies affected by anti-C(w) merit closer scrutiny. Consideration should be given to performing more frequent antenatal ultrasound assessments to detect hydrops fetalis. This may help to support the need for more invasive procedures (cordocentesis and intrauterine transfusions).
authors.affiliation: Department of Neonatology, Medway Maritime Hospital, Gillingham, Kent, UK.
authors.forename: Tanoj Gopalam
authors.initials: TG
authors.lastname: Kollamparambil
authors.forename: Bhavdeep Rameshchandra
authors.initials: BR
authors.lastname: Jani
authors.forename: Maadh
authors.initials: M
authors.lastname: Aldouri
authors.forename: Aung
authors.initials: A
authors.lastname: Soe
authors.forename: David Anthony
authors.initials: DA
authors.lastname: Ducker
mesh_terms: D000328:Adult; D005260:Female; D006801:Humans; D015160:Hydrops Fetalis / Q000209:etiology*; D007231:Infant, Newborn; D007518:Isoantibodies / Q000276:immunology*; D008297:Male; D011247:Pregnancy; D012203:Rh Isoimmunization / Q000150:complications* / Q000175:diagnosis; D016216:Ultrasonography, Prenatal
chemical_list: D007518:Isoantibodies; C051138:anti-c antibody