title: Fetal and Neonatal Alloimmune Thrombocytopenia: Management and Outcome of a Large International Retrospective Cohort.
abstract: OBJECTIVE
  To evaluate the management and outcome of a large international cohort of cases of pregnancies complicated by fetal and neonatal alloimmune thrombocytopenia (FNAIT).
  
  
  METHODS
  This was an observational prospective and retrospective cohort study of all cases of FNAIT entered into the international multicentre No IntraCranial Haemorrhage (NOICH) registry during the period of 2001-2010. We evaluated human platelet antigen (HPA) specificity, the antenatal and postnatal interventions performed, and clinical outcome.
  
  
  RESULTS
  A total of 615 pregnancies complicated by FNAIT from 10 countries were included. Anti-HPA-1a was the most commonly implicated antibody. Antenatal treatment was administered in 273 pregnancies (44%), varying from intrauterine platelet transfusion to maternal administration of immunoglobulins, steroids, or a combination of those. Intracranial haemorrhage was diagnosed in 23 fetuses or neonates (3.7%). Overall perinatal mortality was 1.14% (n = 7).
  
  
  CONCLUSIONS
  This study presents the largest cohort of cases of FNAIT published. Our data show that antenatal treatment for FNAIT results in favourable perinatal outcome. Over time, in most centres, treatment for FNAIT changed from an invasive to a complete non-invasive procedure.
authors.affiliation: Department of Obstetrics, Leiden University Medical Centre, Leiden, The Netherlands.
authors.forename: Marije M
authors.initials: MM
authors.lastname: Kamphuis
authors.forename: Heidi
authors.initials: H
authors.lastname: Tiller
authors.forename: E S
authors.initials: ES
authors.lastname: van den Akker
authors.forename: Magnus
authors.initials: M
authors.lastname: Westgren
authors.forename: Eleonor
authors.initials: E
authors.lastname: Tiblad
authors.forename: Dick
authors.initials: D
authors.lastname: Oepkes
mesh_terms: D005260:Female; D006801:Humans; D007136:Immunoglobulins / Q000627:therapeutic use; D007231:Infant, Newborn; D008297:Male; D017713:Platelet Transfusion; D011247:Pregnancy; D011248:Pregnancy Complications / Q000276:immunology*; D011256:Pregnancy Outcome; D012189:Retrospective Studies; D013256:Steroids / Q000627:therapeutic use; D054098:Thrombocytopenia, Neonatal Alloimmune / Q000628:therapy*; D016896:Treatment Outcome
chemical_list: D007136:Immunoglobulins; D013256:Steroids
keywords: Antenatal treatment; Fetal and neonatal alloimmune thrombocytopenia; Fetal therapy; Intracranial haemorrhage; Large cohort