CBC results for patients with sickle cell disease who have a hereditary persistence of fetal hemoglobin (Hb S/HPFH) may appear normal or demonstrate a mild to moderate anemia. The CBC and peripheral blood smear for a patient with Hb S/HPFH appear below.
Reference intervals may vary between facilities and are dependent on patient age and gender. The reference intervals that are shown below are specific to this case.
| Parameter | Patient Result | Reference Interval |
| White blood cell count | 6.4 | 3.8 - 9.8 x 109/L |
| Red blood cell count | 4.78 | 4.50 - 5.90 x 1012/L |
Hemoglobin | 11.9 | 13.8 - 17.2 g/dL |
| Hematocrit | 37.7 | 41 - 50% |
| MCV | 81 | 80 - 100 fL |
| RDW | 13.2 | 12 - 14.6 |
| Platelet count | 230 | 140 - 440 x 109/L |
