When is the red blood cell distribution width (RDW) study performed in the workup of hemolytic anemia?

Updated: May 27, 2021
  • Author: Srikanth Nagalla, MD, MS, FACP; Chief Editor: Emmanuel C Besa, MD  more...
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Answer

The red blood cell distribution width (RDW) study is usually performed when a CBC count is requested. An increased RDW is a measure of anisocytosis that can occur in hemolytic anemias.


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