is_about blood cell platelet cancer autoimmune disease acquired polycythemia vera chronic myeloid leukemia blood component anemia (phenotype) platelet count true The number of PLATELETS per unit volume in a sample of venous BLOOD. Dani Welter blood platelet number MedDRA:10035525 NCIt:C51951 MESH:D010976 http://www.nlm.nih.gov/medlineplus/ency/article/003647.htm SNOMEDCT:61928009 complete blood cell count