Multiple possible. If a patient has had recent surgery, that might be the cause. B12 and Folic Acid deficiencies can cause a high MCV (ie, it can represent a nutritional cause). Other possibilites include hemolysis (breaking of red blood cells), kidney disease and other chronic diseases.
Recent blood work. Wbc, Rbc, hgb, hct, mcv normal. Low mchc. High Rbw. What does this point to? Had iron def anemia in past.
You can look these. all up, e.g. http://en.wikipedia.org/wiki/Mean_corpuscular_hemoglobin_concentration, http://en.wikipedia.org/wiki/Red_blood_cell_distribution_width, etc. If the MCV is ?er Nl, combined with ?ed MCHC these could be c/w some mild Fe deficiency currently. If Reticulocyte count is elevated, this would be c/w the?ed RDW due to an ?ed mix of younger, immature plus older cells. These values just clues. Read more...