Polychromatophilic macrocytes in the peripheral smear are most likely:

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Polychromatophilic macrocytes are red blood cells that have recently been released from the bone marrow and still contain RNA, giving them a blue-gray color. These are most commonly reticulocytes, which are immature red blood cells that have been released from the bone marrow before fully maturing. Siderocytes are red blood cells that contain iron granules and are seen in conditions such as hemochromatosis. Spherocytes have a smaller size and lack central pallor due to their spherical shape, and are seen in conditions such as autoimmune hemolytic anemia. Pappenheimer bodies are iron-containing inclusions within red blood cells and are seen in conditions such as sideroblastic anemia.

Polychromatophilic Macrocytes in the Peripheral Smear Are Most Likely