: 1- Is there any relation between gamma delta T(γδ T) cells and B cell subpopulations in Behçet’s disease pathogenesis? 2- Do γδ T cells have any role in the pathogenesis of oral ulcers in Behçet’s disease? 3- Do B cells have any role in the pathogenesis of oral ulcers in Behçet’s disease? all of these questions are BOLD as subheading in the text