Essential Thrombocytosis More Condition_symptoms Is Essential Thrombocytosis A Blood Cancer?

Is Essential Thrombocytosis a blood cancer? - essential thrombocytosis more condition_symptoms

A parent has been diagnosed with essential thrombocytosis. The condition was detected platlette due to a high number, confirmed by biopsy of the bone marrow. She takes Hydrea.

We can not work if it is a type of blood cancer or not. Does anyone know?