<unk>  is a condition characterized by abnormally low levels of platelets, also known as thrombocytes, in the blood. It is the most common coagulation disorder among intensive care patients and is seen in 20% of medical patients and a third of surgical patients. A normal human platelet count ranges from 150,000 to 450,000 platelets per microliter of blood. Values outside this range do not necessarily indicate disease. One common definition of<unk>  requiring emergency treatment is a platelet count below 50,000 per microliter.<unk>  can be contrasted with the conditions associated with an abnormally high level of platelets in the blood: thrombocythemia (when the cause is unknown), and thrombocytosis (when the cause is known).
Thrombocytopenia
Lymphocytopenia
Monocytopenia
Reticulocytopenia
Cytopenia
Lymphocytosis
Reticulocytosis
Plasmacytosis