A 57-year-old male presents to his primary care provider for red face, hands, feet, ears, and headache and drowsiness. A blood smear reveals an increased number of erythrocytes, indicat-ing:
a. polycythemia vera (PV).
b. leukemia.
c. sideroblastic anemia.
d. hemosiderosis.
ANS: A
PV is characterized by excessive proliferation of erythrocyte precursors in the bone marrow. Leukemia is not manifested by changes in erythrocytes. Sideroblastic anemia is characterized by sideroblastic rings. Hemosiderosis is iron overload.
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