What does a low hct, low hgb, and high rdw mean?

Anemia: A low hemoglobin (HGB) and hematocrit (hct) mean that one has anemia, or low numbers of red blood cells. A high RDW (or red cell distribution width) indicates that the red blood cells are all of very different sizes. The most common thing to cause this constellation of findings is iron defciency anemia, but other things can too so it is important that your problem be evaluated by a hematologist.