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Two familial cases of dissociation of saliva Lea levels and erythrocyte Lewis types.

Two familial cases in which the saliva Lea levels were seen to dissociate with the donors' red blood cell (RBC) Lewis types are reported. In case 1, the saliva from a donor with an RBC type of Le(a+b-) contained a low level of Lea antigen. A low Lea level was also observed in the saliva from this proband's father who has an RBC type of Le(a+b-). In case 2, the saliva from a donor with an RBC type of Le(a-b+) contained a high level of Lea antigen. High Lea levels were also present in the saliva of this proband's father and brothers with an RBC type of Le(a-b+).