Thrombocytopenia is a condition in the blood where there is a reduction of the platelets (thrombocytes) from the norm. Platelets play an important role in blood clotting and so the decrease can mean increased bleeding. Thrombocytopenia can be of a secondary nature which means the result of another condition, eg. Infection, tumor or drug reaction, or of a primary nature where no other causative factor is found and thought to be an auto-immune problem. Some symptoms might include nosebleeds, bruising on the skin or lips, blood in its stool or urine and lethargy or weakness. Treatment generally includes steroids and in more serious cases transfusions. 

Cavalier King Charles Spaniel owners please note: 

Cavaliers may have a pseudothrombocytopenia where they may have a lower than normal platelet count or larger than normal platelets which cannot be counted by machine and should not be considered pathological. In Cavaliers manual counting of the platelets should be done. Unless symptomatic no treatment is required. 

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