Relative erythrocytosis can be differentiated from secondary erythrocytosis and polycythemia vera by what clinical feature(s)?

Question

Quizplus · Accepted Answer

In relative erythrocytosis, there is an increase in red blood cell count, but the overall red cell mass is normal. This differentiates it from secondary erythrocytosis (caused by an underlying condition such as hypoxia or renal disease) and polycythemia vera, which both have an increase in red cell mass. Lung disease (A) and cyanosis (B) can be associated with hypoxia and secondary erythrocytosis, but are not specific to this type of erythrocytosis. Hepatomegaly (C) and a normal LAP (E) are not specific features of any type of erythrocytosis.

Relative Erythrocytosis Can Be Differentiated from Secondary Erythrocytosis and Polycythemia