label: Abnormal proerythroblast morphology
label_lc: abnormal proerythroblast morphology
description: "Anomalous form of the proerythroblast, i.e., the immature, nucleated erythrocyte occupying the stage of erythropoeisis that follows formation of erythroid progenitor cells. This cell is CD71-positive, has both a nucleus and a nucleolus, and lacks hematopoeitic lineage markers."