IFNA1 and synovial sarcoma: Functional analysis and ssGSEA (Single revealed upregulation of cell cycle and DNA damage response in SS subtype I, vasculature and endothelium development in SS subtype II, and epithelial cell differentiation, Wnt‐signaling and IFN‐alpha and IFN‐gamma signaling in SS subtype III (Figure 1g,h; Figure S10, Supporting Information).