CD4 and synovial sarcoma: Here, we present a comprehensive analysis of peripheral and lesional CD4+ T-cells at different stages of SG immunopathology in a large cohort of patients with SS, a disease in which ectopic GC have been linked to the progression towards severe extraglandular manifestations and B-cell MALT-L.4 To start with, we reported the first high throughput transcriptomic profiling of ELS+ and ELS- SG tissues.