Tissue-resident memory T cells (Trm): ☝️Do not recirculate by blood or lymphatics ☝️Can drive recurrent inflammation ☝️Fixed-drug eruption is an example CD8Trm - abundant in late stage non-inflamed RA synovium #ACR22 @RheumNow #yearinreview #RheumTwitter https://t.co/LfTI0LamkN