Abstract
The study in Algeria over a period of 3 years of 90 cases of idiopathic thrombopenic purpura out of 409 hemorrhagic syndromes, showed the following peculiarities: the chronic forms are as frequent in the child as in the adult and we did not observe any subacute forms. Except in one case the use of prednisone at a dose of 2 mg/kg gave no result in patients who were not improved by a dose of 1 mg/kg.