Its normal range is 80-96 fl.20 MCV can be within normal range despite B12 deficiency specially with concomitant iron deficiency, drugs like Hydroxyurea for example and there may be normocytic anaemia or even microcytic anaemia in some cases: 80-100 fl: 25 percent probability of successful diagnosis 115-129 fl: 50 percent probability of successful diagnosis Above 130 fl: 100 percent probability.19 LDH Levels may be raised and there may be hyperchlorhydria.