Hi, I was recently diagnosed with Essential Thrombocytoss (ET) and Jak2 mutation, after elevated platelets over a period of a year. This through extensive blood testing. I have been on Hydrea 3 times a week at 500mg each and daily 81mg aspirin. I don't feel any different before or after diagnosis and have to look at it as a positive not a negative. I will die with the disease not from it! I strongly advise your son to seek another opinion so that he could benefit from medication to lower the platelets. Well wishes to him!