Identification of the para-Bombay phenotype AB h m.

Objective To identify para-Bombay phenotype AB h m. Method ABO and H phenotype were typed. Absorption and elution were performed. Saliva was tested by inhibitory reaction. Direct sequencing was performed and family study was done. Results Proband was typed as rare para-Bombay phenotype AB h mand anti-H was detected in his serum. Family study suggested that the inheritance was autosomal recessive. Conclusion Rare AB h m phenotype was identified and anti-H has been detected in his serum.