Medical Term:

Rieder cells

Pronunciation: rē′dĕr

Definition: abnormal myeloblasts (12–20 mcm in diameter) in which the nucleus may be widely and deeply indented (suggestive of lobulation), or may actually be a bilobate or multilobate structure; such cells are frequently observed in acute leukemia, and probably represent a more rapid maturation of the nucleus than that of the cytoplasm.

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