48 hour old blood sample

 
48 hour old blood

A 48 hour old blood sample, showing extreme crenation of erythrocytes (echinocyte formation). There is also an apoptotic leukocyte (undergoing pyknosis and karyorrhexis), likely a neutrophil (based on the pink granules in the cytoplasm). When many of the leukocytes in blood are apoptotic, an accurate differential leukocyte count cannot be performed.

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