TSLP and Recurrent tonsillitis: We observed increased expression of TSLP in tonsillar GCs of IgAN patients compared to IgAN patients with TW treatment and non-IgAN chronic tonsillitis, and there was a positive correlation between IgA and TSLP expression levels in tonsils (R = 0.768, and P < 0.05 for Spearman’s correlation; Figure 1D).