,17 MS lesional T cells showed expression of core TRM-cell markers (CD69, CD103, CD49a, PD-1, and CD20), although differential expression of some markers suggested a higher migratory potential (CXCR6), a higher activation state (Ki-67), and a higher cytotoxic potential (GPR56).15 This evidence concerns the gene MS4A1 and myeloid sarcoma.