HEMOGLOBIN ,RBC COUNT,MCV,MCH,RDW – CV, HB A LEVEL, HB A 2 LEVEL, FETAL HB LEVEL, HBe LEVEL, SICKLE CELL WINDOW, D – WINDOW, C – WINDOW

HB ELECTROPHORESIS RESULTS SHOWED ALWAYS BE CORRELATED TO THE CLINICAL PICTURE AND MUST NOT BE INTERPRETED IN ISOLATION. RBC TRANSFUSION WITHIN THE PREVIOUS 4 MONTHS MAY MASK OR REDUCE THE PRESENCE OF ABNORMAL HEMOGLOBIN. HEMOGLOBIN A2, C AND S MAYBE RE DECREASED IN IRON DEFICIENCY – HANDS IN CASE OF CONCOMITANT IRON DEFICIENCY, HB VARIANT ANALYSIS MAY NEED TO BE REPEATED AFTER IRON SUPPLEMENTATION THERAPY. FALSE NEGATIVE TESTS ARE KNOWN TO OCCUR WITH HEMOGLOBIN S IN PATIENTS WITH POLYCYTHEMIA OR IN THOSE LESS THAN 3 MONTHS OF AGE. THALASSEMIA TRAITS (HBA2) SHOULD BE IDEALLY REPEATED AFTER 4 MONTHS OF CONFIRMATION. HB F MAY ATTAIN ADULT VALUE AT VARIABLE TIME POINTS DURING INFANCY AND HENCE SHOULD BE REPEATED IN COHERENCE TO  OTHER CLINICAL FINDINGS.