Anisocytosis

Anisocytosis is a medical term meaning that a patient's red blood cells are of unequal size -  indicating that some of your red blood cells are either too big or too small (usually caused by some type of anemia).
 
This is found in anemia and other blood conditions.
For instance, iron deficient anemia will usually cause cells to be smaller than normal. Because some of the RBCs are normal size and some are smaller than normal, there will be anisocytosis, or "RBCs of unequal size."

False diagnostic flagging may be triggered by an elevated WBC count, agglutinated RBCs, RBC fragments, giant platelets or platelet clumps.