Polychromatophilic red cells are marked by the arrows. These cells are larger and lack the characteristic central pallor of more mature erythrocytes. With standard stains, they have a classic blue-gray appearance that results from the residual RNA in the cells. Also found on this blood smear are several stomatocytes.FIG1 

Peter Maslak, Memorial Sloan-Kettering Cancer Center

Peter Maslak, Memorial Sloan-Kettering Cancer Center

Many Blood Work images are provided by the ASH IMAGE BANK, a reference and teaching tool that is continually updated with new atlas images and images of case studies. For more information or to contribute to the Image Bank, visit www.ashimagebank.org.