I Would like VERY MUCH to know why my Platelet count, (on a scale of 140-400) Is over 800? I have recently been put on Hydrea to MAYBE,AS A side effect Might lower my platelet count? Do I have or can I have cancer,of some sort? I have not been given a Diagnoses as yet as to what is causing the over production of Platelets , and could it (fingers crossed) be cancer, and other than just taking hydrea , what should be done?