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Thrombocytopenia (Low Platelet Count)

Thrombocytopenia or low platelet count is a lower than normal number of platelets (less than 150,000 platelets per microliter) in the blood.
Thrombocytopenia may be inherited or acquired when conditions occur, such as the use of certain drugs.
Causes of thrombocytopenia can be classified in three groups:

Diminished production (caused by viral infections, vitamin deficiencies, aplastic anemia, drug induced)
Increased destruction (caused by drugs, heparin [HIT], idiopathic, pregnancy, immune system)
Sequestration (caused by enlarged spleen, neonatal, gestational, pregnancy)

Thrombocytopenic symptoms may include:

Petechiae (superficial tiny areas of bleeding into the skin resulting in small reddish spots)