rare type of blood cancer in which your body produces too many red blood cells. Red blood cells carry oxygen throughout your body. When you have too many red blood cells, your blood thickens and flows more slowly.
His death was most likely the result of: Blood Clots
Explanation:
PV is a blood cancer that causes bone marrow to create an excess of red blood cells. These cells slowly thicken the blood, slowing it's flow and, having detrimental effects. And, with his age, he is prone to clots already, as well as if they did not know he had PV there was a chance of doses of medicines that increase his chances of blood clot.
