I am a male PV patient of 50 years old. Diagnosed in August, 2018. I have done 7 phlebotomy sessions of 500 ml each, and stopped at the end of October due to circumstance changes beyond my control. Last week I finally get to see a doctor again and checked my blood. That was five months without a phlebotomy.
To my surprise, some of my CBC numbers are way too low. RBC was 6.1, which is only slightly higher than normal. Platelet cpunt was 1070, highest it had ever been, and higher than the 955 five months ago. Hematocrit is 37, far lower than the 45 threshold for a phlebotomy.
But the most worrying sign is MCV is only 60. When I was first diagnosed it was 87.5, within the normal range of 80-98. Now it's only 60. I checked my past record, and it sees to be on a trend to go down. This MCV number is a measure of how big the red blood cells are. This implies my body is making red blood cells that's too small and immature.
I am scared. Is this a sign that MY PV has turned in Myelofibrosis, a condition which is much much worse? How could I turn from PV to MF only 7 months after diagnosis? There seems to be an alternative explanation that it could be caused by iron deficit. But there has been only 7 phlebotomies. And my dietary is definitely not lack in iron. I do eat quite a bit of meat in my regular meals.
Any of you see MCV as low as 60, and what could cause that condition?