Hi, my 7 year old daughter has high RBC and RDW but low MCV and MCH. Her hemoglobin is good at 11.5. We are of African decent. She does complain of leg and back pain often. Should I be worried about sickle cell disease or thalasemia? or even a blood cancer? the pediatrician said she has hemoglobinopathy but is doing further testing to find out what exactly.
High RBC with low MTV is seen in beta thalassemia minor commonly.  So just go for he chromatography.  It will give exact diagnosis of hemoglobinopathies. If your hbA2 level is above 3.5 then its thalassemia minor. So go for he chromatography.