Schistocytes in peripheral smear are seen in all except:: (A) DIC, (B) Sickle cell anemia, (C) TTP, (D) HUS
Answer is B. Schistocyte is fragmented RBC which is seen in any condition where there is micro and macro angiopathic hemolytic anemias. Microangiopathic hemolytic anemia is most commonly seen with DIC, TTP, hemolytic-uremic syndrome (HUS), malignant HTN, SLE, and disseminated cancer. Macroangiopathic schistocyte is seen in patient with prosthetic hea valve. Sickle cell anemia: Blockage of vessels by sickled cells causes pain crises and tissue infarction, paicularly of the marrow and spleen. Red cell membrane damage caused by repeated bouts of sickling results in a moderate to severe hemolytic anemia.