Immune thrombocytopenic purpura is an acquired autoimmune disorder characterized by increased platelet destruction and decreased platelet number ( Cooper N et all 2006) platelet surface membrane proteins become antigenic for unknown reasons, leading to stimulation of the immune system, auto antibodies production and platelet destruction ( Gasbarrini A et all 2000) It is associated with the production of auto antibodies directed against platelet glycoprotein complex 2b/3a and/or 1b/1x , resulting in accelerated destruction of platelets by the reticular endothelial system via the activity of Fcc receptor bearing phagocytic cells ( Provan & Newland et al 2002) Recent studies have demonstrated that the pathogenesis of ITP envolves multifactorial autoimmune mechanisms of both humoral and cellular immunity and that acute and chronic forms may represent two distinct immunopathological disorders ( Cooper N et al 2006) ( Gern Sheimer T 2009)