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.
An image from a peripheral blood smear demonstrating marked spherocytosis and polychromasia in hereditary spherocytosis (100X oil immersion). A stippled nucleated red blood cell (center) can also be seen.