idiopathic thrombocytopenic purpura

Idiopathic thrombocytopenic purpura (ITP) is the condition of having a low platelet count (thrombocytopenia) of no known cause (idiopathic). As most causes appear to be related to antibodies against platelets, it is also known as immune thrombocytopenic purpura. Although most cases are asymptomatic, very low platelet counts can lead to a bleeding diathesis and purpura.
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Idiopathic thrombocytopenic purpura, or ITP, is a bleeding disorder caused by an abnormally low level [more]Idiopathic thrombocytopenic purpura - Community and Resources

Noun
1. purpura associated with a reduction in circulating blood platelets which can result from a variety of factors
(synonym) thrombocytopenic purpura, purpura hemorrhagica, Werlhof's disease
(hypernym) purpura, peliosis