DNAJC10 and synovial sarcoma: The predominant expression of ERdj5 in the epithelial compartment of MSGs is consistent with the fact that epithelial cells possess a central role in SS: They are intrinsically activated, expressing inflammatory mediators and specific, traditionally expressed in immune cells, adhesion molecules, and receptors (28), and act both as targets and orchestrators of local autoimmune inflammatory responses, hence the etiological name of SS as “autoimmune epithelitis” (29).