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Neonatal thrombocytosis resulting from the maternal use of non-narcotic antischizophrenic drugs during pregnancy
  1. Y Nako,
  2. A Tachibana,
  3. T Fujiu,
  4. T Tomomasa,
  5. A Morikawa
  1. Department of Paediatrics, Gunma University School of Medicine, Gunma, Japan
  1. Dr Nako, Department of Paediatrics, Gunma University School of Medicine, 3-39-15 Showa-machi, Maebashi, Gunma 371-8511, Japanyanako{at}


Neonatal thrombocytosis can result from maternal narcotic drug abuse. The case of a male infant is reported who was born to a woman with schizophrenia treated with non-narcotic psychotropic drugs during pregnancy; he developed severe prolonged thrombocytosis. The platelet count reached 1310 × 109/l on day 15. This thrombocytosis persisted for three months. The patient was treated with dipyridamole. A bone marrow aspirate showed normal myeloid and erythroid precursors with an increased number of megakaryocytes. Plasma concentrations of interleukin 6 and thrombopoietin were suppressed. No obvious complications from the thrombocytosis occurred, and the platelet count fell to within the upper limit of normal after 3 months of age. This case indicates that thrombocytosis may occur in infants born to mothers treated with non-narcotic psychopharmaceutical drugs during pregnancy. The thrombocytosis in this case may have been induced by factors other than interleukin 6 or thrombopoietin.

  • neonatal drug withdrawal syndrome
  • psychopharmaceuticals
  • thrombocytosis
  • thrombopoietin

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