[Comprehensive analysis of the structural phenotypes and functional characteristics of B cells in oral lichen planus and oral lichenoid lesions through single-cell and spatial transcriptomics].

Compared to normal mucosa, extensive B-cell infiltration is observed in both OLP and OLL, accompanied by significant differences in B-cell phenotypes and proportions. B cells appear to play a central role in local immune responses, primarily through the formation of TLS. However, the precise functional mechanisms underlying their involvement require further investigation.