Thrombocyte is another name for platelets and thrombocytes are important blood cells that help in clotting of the blood. An variation in number of platelets may occur in various diseases.
Thrombocytosis implies an increase in platelet count that threatens homeostasis and warrants investigation.
In a healthy individual, a normal platelet count ranges from 150,000 and 450,000 per mm³ (or microlitre) (150–450 x 109/L). The counts over 750,000 (and especially over a million) are considered serious enough to warrant investigation and intervention.
High platelet levels do not necessarily signal any clinical problems, and are picked up on a routine full blood count.