The Korean Journal of Blood Transfusion : eISSN 2383-6881 / pISSN 1226-9336

Table. 2.

Table. 2.

Possible causes of ABO discrepancy in 238 cases

Category Possible causes % (N)
RBC Extra reactivity (N=9) Auto-agglutinins 1.5 (5/339)
BMT 0.6 (2/339)
Paraproteinemia 0.3 (1/339)
Unknown 0.3 (1/339)
Weak or missing reactivity (N=175) ABO subgroup 30.1 (102/339)
Unknown 18.3 (62/339)
Hematologic malignancy 3.2 (11/339)
Serum Extra reactivity (N=121) ABO subgroup 26.8 (91/339)
Unexpected antibody 6.2 (21/339)
Unknown 2.7 (9/339)
Weak or missing reactivity (N=34) Unknown 8.6 (29/339)
BMT 0.9 (3/339)
Age-related (young age) 0.6 (2/339)
Total 339*

*Some cases revealed multiple causes of ABO discrepancy. Hence, a total of 339 causes were found in 238 ABO discrepant cases.

ABO discrepancy due to unexpected antibodies comprised 5 cases with autoantibodies, 5 cases with anti-M, 4 cases with anti-P1, 4 cases with unidentified alloantibodies, 1 case with a cold autoantibody, 1 case with an anti-N, and 1 case with a coexisting anti-P1 and cold autoantibody.

Abbreviations: BMT, bone marrow transplantation; RBC, red blood cell.

Korean J Blood Transfus 2023;34:12-20 https://doi.org/10.17945/kjbt.2023.34.1.12
© 2023 Korean J Blood Transfus