Idiopathic Thrombocytopenic Purpura Following Vaccinations

Abstract

Among the survey of newly diagnosed idiopathic thrombocytopenic purpura (ITP) patients which were collected by the ITP committee, The Japanese Society of Pediatric Hematology, ITP patients following vaccination were analyzed. During 2000 to 2005, 8 patients were registered with ITP following vaccination. Their ages ranged from 0-6 years old, 7 patients were boys, 5 patients were followed by rubella vaccination, 6 patients had only dry purpura, and 2 patients were of the chronic type. In 2006, 18 patients were registered with ITP following vaccination. Their ages ranged from 0-9 years old, 8 patients were boys, 13 patients had only dry purpura, and 1 patient was of the chronic type. Further survey is needed to clarify the kinds of vaccine which cause ITP. Information collection for not only ITP, but also other side effects following vaccinations in a larger scale and by a more systematic method is needed.