Immunofluorescence Pattern of Autoimmune Bullous Diseases in Iranian Patients

Background & objective: autoimmune bullous diseases are associated with autoimmunityagainst structural components in the skin and mucous membranes. autoantibodies are againstthe intercellular junctions in pemphigus disease and hemidesmosomal unchoring complex inpemphigiod diseases and epidermolysis bullosa aquisita. the tissue-bound and circulatingserum autoantibodies can be detected with direct immunofluorescence (dif) and indirectimmunofluorescence (iif) tests. the aim of this study was to pinpoint the immunofluorescencepattern of iranian patients with autoimmune bullous diseases.methods: in a prospective case series study, sixteen patients with autoimmune disease enrolled inthe study for two years. perilesional skins and sera from the patients were used in dif and iif fordetection of immunofluorescence pattern.results: out of 16 cases, 9 cases had pemphigus and 7 cases had bullous pemphigoid. all cases ofpemphigus had positive dif in intercellular region with lacelike pattern; igg was detected in allcases, iga in 1(11.1%) case and c3 in 3 (33.3%) cases. one (11.1%) case of pemphigus had positiveiif in intercellular region with lacelike pattern; circulating autoantibodies were igg and iga. allcases of bullous pemphigiod had positive dif in dermal-epidermal junction with linear pattern.igg was detected in all cases, igm in one (14.3%) case, and c3 in six (85.7%) cases. one (14.3%)case of bullous pemphoid had positive iif in dermal-epidermal junction with linear pattern;circulating autoantibody was igg.conclusion: immunofluorescence tests are sensitive diagnostic methods for autoimmune bullousdiseases. iif positive cases in our study were lower compared to the previous reports.