title: Neonatal thrombocytopenia.
abstract: Thrombocytopenia occurs in up to a third of preterm neonates admitted to intensive care units. In these babies, thrombocytopenia typically presents in one of two patterns: early-onset thrombocytopenia occurring within 72 h of birth and late-onset thrombocytopenia which develops after 72 h. Early-onset thrombocytopenia is most commonly caused by disorders associated with placental insufficiency (e.g. maternal hypertension), is mild-moderate, self-limiting and requires no treatment; it is caused by reduced platelet production. Late-onset thrombocytopenia is usually due to bacterial sepsis or necrotising enterocolitis; it is often severe (platelets <50 x 10(9)/l), prolonged and requires treatment with platelet transfusions. In term babies, neonatal thrombocytopenia is usually severe and most commonly caused by bacterial sepsis, perinatal asphyxia or neonatal alloimmune thrombocytopenia. There is a lack of evidence-based guidelines for treatment of neonatal thrombocytopenia. The most important future developments will depend upon studies aimed at determining optimal platelet transfusion schedules for term and preterm neonates.
authors.affiliation: Department of Haematology, Great Ormond Street Hospital, Great Ormond Street, London WC1N 3JH, UK.
authors.forename: Subarna
authors.initials: S
authors.lastname: Chakravorty
authors.forename: Neil
authors.initials: N
authors.lastname: Murray
authors.forename: Irene
authors.initials: I
authors.lastname: Roberts
mesh_terms: D006801:Humans; D007231:Infant, Newborn; D007234:Infant, Premature; D017713:Platelet Transfusion / Q000379:methods*; D013921:Thrombocytopenia / Q000175:diagnosis* / Q000209:etiology* / Q000503:physiopathology* / Q000628:therapy