The objective of this work was to determine the frequency of clinical manifestations of immune thrombocytopenic purpura and its association with platelet count, response to splenectomy and predictive factors for response and chronicity. This retrospective study included 187 children diagnosed at Hospital das Clínicas, Federal University of Minas Gerais, Brazil, between April 1988 and December 2001. About 76% of the cases had asymptomatic or clinically mild disease. Cutaneous bleeding alone was seen in 96% of the symptomatic cases. Severity of symptoms was associated with low platelet count. The acute disease was observed in 123 patients (70.7%) and 51 (29.3%) developed the chronic disease. Insidious presentation (26.2%) was associated with a larger number of splenectomies (p=4x10-7) and with a reduced response to steroids (p=0.003). Additionally, the lack of response to steroids (p<1x10-7) and insidious presentation were predictive factors for chronicity (p=1x10-7). Splenectomy resulted in remission in 74.5%. Remission was the final outcome for 80.2% of patients. Remission-associated factors included being male (p=0.02), a lower platelet count at diagnosis (p=0.004), response to steroids (p=0.003), and the occurrence of a first remission (p<1x10-7). The disease in childhood is benign and self-limiting with severity of symptoms being associated with a low platelet count.
Immune thrombocytopenic purpura; idiopathic thrombocytopenic purpura; thrombocytopenia; child
