TY - JOUR T1 - Discrepancy in ABO Blood Grouping in a Blood Donor: A Case Report TT - JF - IJBC JO - IJBC VL - 10 IS - 2 UR - http://ijbc.ir/article-1-795-en.html Y1 - 2018 SP - 61 EP - 63 KW - Discrepancy KW - Blood grouping KW - B subgroup KW - Forward typing KW - Reverse typing N2 - Detection of ABO blood groups through agglutination is the basis of pre-transfusion testing. However, weak agglutination reactions may be obtained with reagent antibodies and are a result of weak expression of A and B antigens on red blood cell surface which may cause a discrepancy in blood group typing. Here, we report a donor which showed discrepancy between red blood cells (forward) and serum (reverse) typing. A detailed analysis revealed the blood type as a variant of blood group B. Subgroup of B is a very rare phenotype of blood. This is the first case ever detected in Kurdistan blood transfusion Center. M3 ER -