Full Blood Count

A raised neutrophil and platelet count supports a diagnosis of PV, although it should be remembered that smokers have higher neutrophil counts than nonsmokers do. The red cell indices may be suggestive of iron deficiency, which is common in PV. An eosinophilia and/or basophilia are occasionally found in PV but are only supportive of this diagnosis.

Table 9-2.

Common Causes of Secondary Polycythemia


Mutant high-affinity Hb

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