S100A9 and peeling skin syndrome: ↑ levels of S100A8(calgranulin A) and S100A9 (calgranulin B) in parotid saliva of SS-HR and SS-M patients compared to HC.↑ levels of S100A8/A9 in UWS in SS subgroups compared to HC and SNOX.The median concentration in SS-M were higher than in HC, SNOX and non-risk pSS patients.S100A8 and -A9 were 20-fold higher in UWS than parotid saliva.