Which of the following results is or are typical in stage 3 iron deficiency anemia?
a. Elevated reticulocyte percentage
b. Thrombocytopenia
c. Macrocytic red cells
d. Low mean cell volume (MCV), MCH, and mean cell hemoglobin concentration (MCHC)
ANS: D
In stage 3 iron deficiency the red cells are microcytic and hypochromic. Therefore the MCV, MCH, and MCHC are all low. (The MCH is actually lower than would be expected for the red cell size if it had been normochromic.) The reticulocyte count (%) is low, sometimes thrombocytosis is seen, and the red cells are not macrocytic.
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