ltp is an abbreviation for primary immune thrombocytopenia, also called idiopathic thrombocytopenic purpura. 1. This is an autoimmune disease, it is currently believed that autoantibody sensitization of platelets by the monocyte macrophage system excessive phagocytosis and destruction is its main pathogenesis. 2. Clinical manifestations, divided into acute and chronic type two, acute type patients, the onset of the disease is more acute, many patients will appear in the body of multiple parts of the bleeding; chronic type patients many do not have obvious clinical manifestations, some may appear in the skin mucous membrane of the bleeding, or menstrual flow increased. Primary immune thrombocytopenia is a very common disease in hematology and can be diagnosed by routine blood tests and bone marrow aspiration.