Positive cross-match for B-lymphocyte antigens (IA like) and kidney allograft behaviour.

We describe six cases of kidney graft performed against a positive anti-B lymphocyte cross-match. These antibodies were found after retrospective and systematic screening of the effect of the recipient sera upon donor frozen B lymphocytes. As opposed to the consequences of anti-HLA "SD" preimmunisation, none of the transplantation rapported here failed by acute rejection. The benefic role of anti-B lymphocyte antibodies "Ia like" present at the time of grafting is then suggested.