An ABO discrepancy was observed in a 37-year-old patient with duodenal ulcer bleeding and B subgroup was suspected. The results of adsorption-elution test, saliva and serum inhibition test and family study suggested Bx phenotype that is not a usual phenotype and is the second case to be reported in Korea.
Adult ; Duodenal Ulcer ; Hemorrhage ; Humans ; Korea ; Phenotype ; Saliva