Hi...this is about my brother in law. He volunteered to donate one of his kidneys to his sister (My wife). When we discovered he has high hb -18.5, pcv-54, RBC-6.2 constantly for the last 3 months. He has been one of the healthiest people in the family. Never had any symptoms of any problems. Still doesn't have any symptoms. He is tested for Jak2 mutation and EPO level. Hope we are on the right track and should we just stop thinking about him as a kidney donor ?