Macrocytosis refers to a blood condition in which red blood cells are larger than normal; the condition can occur with or without associated anemia. Macrocytic anemia can be considered as nonmegaloblastic or megaloblastic. Megaloblastic anemias are a group of macrocytic anemias in which the bone marrow shows megaloblastic erythropoieses. Laboratory testing may include a CBC, peripheral blood smear, and reticulocyte count.
Last Update: December 2018