“…CBs within the epithelium or within the superficial connective tissue, which stain with any combination of antifibrinogen, anti-C3, or anti-Ig, may or may not be present. 17 In our study, the positive yield of DIF was 75%, whereas, in previous studies, the positive yield of DIF in LP cases (mostly from oral LP cases) was in the range 37-97%. [3][4][5]7,8,11 In most previous studies, the specimens were derived from the oral mucosa; however, Annessi et al .…”