Thrombocytosis (Primary and Secondary) - Why Is My Platelet Count High? - Hematology

Thrombocytosis (Primary and Secondary) - Why Is My Platelet Count High? - Hematology.

Thrombocytosis (thrombocythemia) is increased platelet count.
Thrombocytopenia is decreased platelet count.

Normal platelet count is 150,000 to 400,000/ microliter.
Platelet count test is commonly ordered as part of the complete blood count (CBC).

There are 2 types of thrombocytosis: primary and secondary.
Primary thrombocytosis is one of the myeloproliferative disorders, which I have talked about during my series on hematology https://goo.gl/KxAu6F

Secondary thrombocytosis is secondary to another disease (e.g. infection or inflammation).

Hemostasis is defined as “cessation of blood bleeding”.
There are 2 types of hemostasis:
1. Primary hemostasis: formation of weak, temporary platelet plug (by platelets).
2. Secondary hemostasis: formation of stronger fibrin meshwork (by coagulation factors).


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Books that I use for this series:
► Guyton and Hall Medical Physiology Textbook https://goo.gl/yZoeS9
► Goljan Rapid Review Pathology, https://amzn.to/2MufTPw
► Harrison’s Internal Medicine https://amzn.to/2OJiVNf
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► Davidson’s Principles and Practice of Medicine https://amzn.to/2vTmf1p


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