1. Polycythemia vera  (Trust Mark: Doctor-Reviewed)
Polycythemia vera is an abnormal increase in the number of blood cells (primarily red blood cells) produced by the bone marrow.• Reviewer: David C. Dugdale, III, MD, Professor of Medicine, Division of General Medicine, Department of Medicine, University of Washington School of Medicine; and Yi-Bin Chen, MD, Leukemia/Bone Marrow Transplant Program, Massachusetts General Hospital. Also reviewed by David Zieve, MD, MHA, Medical Director, A.D.A.M., Inc.

2. Polycythemia Vera  (Trust Mark: Doctor-Reviewed)
Polycythemia vera (PV) is a chronic blood disorder marked by an abnormal increase in three types of blood cells produced by bone marrow: red blood cells (RBCs), white blood cells (WBCs), and platelets. PV is called a myeloproliferative disorder, whi...• Author: Rebecca J. Frey