I was just diagnosed with Jak2/ET and had a bone marrow biopsy that ruled out other cancers . My levels are 450 to 510 now , but my Oncologist/Hemo acted like she wasn’t very familiar with this disease , so I’m getting another opinion from specialists in Blood disorders . I spoke with a specialist friend and she said there is nothing that I did at all to cause this . I just had a gene mutation (Jak2) that attacked my platelets and made them multiply . I had blood draws that ruled out infections , anemia, etc . Nope , I was just unlucky . They call this “The Old People’s Disease) and people from 60-80 get it . Well , I’m 69! . Haven’t started on HU yet , only 2 baby aspirin until I switch doctors or my platelets increase a lot more . So far though , a horrible headache , dizziness, mouth sores and fatigue. I was told only .01% of the population have this, but it seems like from this blog , that number is wrong 😑 .