Lack of association between Behçet's disease and major histocompatibility complex class II antigens in an ethnically diverse North American Caucasoid patient group.

A group of 25 North American Caucasoid patients with well defined Behcet's disease were serologically typed for HLA-DR and DQw antigens. No significant associations were seen when results were compared with a group of 73 normal Caucasoid controls tested concomitantly.