Which of the following red cell indices support microcytic hypochromic red cell morphology?
MCV (fL) MCH (pg) MCHC (g/dL)
a. 120 36 35
b. 68 22 28
c. 90 30 34
d. 75 30 34
ANS: B
Because the red cells are microcytic, the MCV must be below reference range. They are also hypochromic, so the MCHC must be below reference range. Both the smaller volume and lower concentration of hemoglobin mean that the MCH has to be significantly below reference range.
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