Antiphospholipids antibodies in a 12-month-old presenting with idiopathic thrombocytopenic purpura.

A 12-month-old Caucasian female with a history of recurrent ear infections presented to the emergency room with petechiae, severe thrombocytopenia (4000/microL), and abnormally prolonged activated partial thromboplastin time. Further autoantibody investigation detected antinuclear antibodies, anti-double-stranded DNA, and antiphospholipid antibodies. Platelet count, in response to intravenous immunoglobulin infusion, increased to more than 100 x 10(3) plt/microL.