An unusual case of post-transfusion purpura: good transient response to high-dose immunoglobulin.

A 62-year-old woman with an unusually protracted post-transfusion purpura failed to respond to three 3-litre plasma exchanges and prednisolone (50 mg/day) for 10 days but then had a good though transient response to two courses of high-dose immunoglobulin infusions with cessation of bleeding. The subsequent recurrent thrombocytopenia was mild and asymptomatic and only partially controlled by corticosteroids but finally resolved completely after 5 months.