An image from a bone marrow smear demonstrating two metamyelocytes beside a blast and neutrophil band (center) found in a patient with normal bone marrow (50X oil immersion). Other cell granulocytes and erythroid precursors can be seen surrounding the central cluster
This image demonstrates an immature-looking lymphocyte seen on a newborn smear. Lymphocytes can be immature-looking up to 6 months of age, as the newborn's immune system is constantly exposed to new antigens.