Thrombocytosis

This neoplasm is not reportable.
Name
Thrombocytosis
Not Reportable
This neoplasm is not reportable
Alternate Names
Chronic thrombocytosis
Reactive thrombocytosis
Secondary thrombocytosis
Thrombocythemia, NOS
Definition
Thrombocytosis and thrombocythemia are conditions in which the blood has a higher than normal number of platelets.

Thrombocytosis is caused when another disease or condition causes a high platelet count. This condition is often called secondary or reactive thrombocytosis.

Thrombocythemia is when the cause of a high platelet count isn't known. The condition sometimes is called primary or essential thrombocythemia.

Thrombocytosis or thrombocythemia by themselves are not reportable. If they are referred to as primary/essential thrombocytosis or primary/essential thrombocythemia, then this is reportable (see 9962/3).

For more information: http://www.nhlbi.nih.gov/health/health-topics/topics/thrm/