“…They can be classified according to the response of retinal cells whose normal value ranges from 0.5 to 1.8% (Buttarello, 2016). High reticulocyte regenerations occur in severe hemorrhagic and hemolytic anemia, while normal or reduced reticulocyte regenerations in the absence of other leukopenia are caused by infectious or inflammatory diseases or drug side effects; On the other hand, when associated with other leukopenia, it is associated with lymphadenopathy or splenomegaly (Khanam & Khan, 2021). In patients with impaired thyroid function, cases of anemia usually occur frequently due to triiodothyronine deficiency, which results in defective erythrocyte maturation.…”