Thrombocytopenia: Causes & Work-ups
Causes There are three major causes of Thrombocytopenia. First, there is a decrease in bone marrow production. If there is a problem in bone narrow, factors such as BM failure, adverse effect of drug, and BM infiltration can be considered. The second is splenic sequestration by splenomegaly. One-third of the platelets usually pass through the liver and spleen, and splenomegaly can increase this amount, reducing the number of platelets in the peripheral blood. Liver cirrhosis, leukemia, splenic vein thrombosis, and portal hypertension may cause splenomegaly. Finally, when platelet destruction increases, thrombocytopenia may occur, which can be further divided into immune destruction and non-immune destruction. Immunologic thrombocytopenia is caused by the removal of monocytes from the spleen of the pletelets that bind the antibody, immune complexes, and complement. The most common cause is infection and autoimmune diseases such as drug, ITP and SLE can also be induced. Non-immunologic ...