DIC smear finding?

• A. Schistocytes
• B. Spherocytes
• C. Auer rods
• D. Target cells

Answer: (A)

In DIC, widespread activation of coagulation produces small clots inside the microvasculature. As red blood cells navigate these narrowed, fibrin-rich vessels, they are mechanically sheared, which creates fragmented red cells known as schistocytes. Seeing schistocytes on a peripheral smear is a classic sign of intravascular hemolysis due to microangiopathic processes like DIC, TTP, and HUS, and they reflect the ongoing destruction of red blood cells as they pass through obstructed vessels.

Spherocytes, by contrast, are membrane-lose red cells seen in hereditary spherocytosis or autoimmune hemolytic anemia, not specifically tied to DIC. Auer rods are needle-like inclusions in myeloid blasts and point to acute myeloid leukemia, not a coagulation disorder. Target cells appear in liver disease, thalassemias, and other hemoglobinopathies, not as a hallmark of DIC. Therefore, the smear finding most consistent with DIC is schistocytes.