Note the larger zones of central pallor in these small RBCs, along with poikilocytosis. The most common cause for a hypochromic microcytic anemia is iron deficiency. The most common ...

This is CBC diagram from patient with iron deficiency anemia, notice that: Hemoglobin, Hematocrit is decreased —> Anemia MCV is low —> Microcytic Anemia MCH is low ...