Reticulocytosis

An increased number of circulating reticulocytes in peripheral blood, reflecting accelerated erythropoiesis, typically in response to increased red blood cell turnover.

Causes

• Hemorrhage

• Hemolysis: Autoimmune hemolytic anemia, sickle cell disease

• Recovery from deficiency: Iron deficiency, Vitamin B12 deficiency, Folate deficiency

• Bone marrow recovery from: Suppression, chemotherapy, transient marrow failure

• Erythropoietin (EPO) therapy

• High-altitude exposure

• Pregnancy