Dear Dr. Douma: A couple of my friends have anemia and I've learned a lot about it through them. But I was recently told that I have a condition called polycythemia, which means I have too much blood.

CHICAGO (Reuters) - Older patients whose red blood cell counts are even slightly out of the normal range are at higher risk of death and heart problems after major surgery, U.S. researchers said on ...

Because the risk of many conditions increases with age, doctors generally recommend more frequent lab testing as you get ...

The results of a blood count can help diagnose or manage leukemia. They can also show how well your current treatment is working. Leukemia is a type of blood cancer that begins in the bone marrow, ...