Not certain this is going to post as I still don’t have a password , so this will be brief. I am 80 yrs old and this year was diagnosed with ET. Platelet count has varied between 525 and 625 this past year. My hematologist wanted me to take Hydrea, 500 mg twice a day. I am hesitant to start at this stage of my life and also because my platelet count is not as high as many. I am told I have the JAK2. I have not had a bone marrow biopsy and it hasn’t been suggested. Any thoughts?