SOCS1 and thymoma: A couple of thymic T cell-specific genes such as CD69, SOCS1 (STAT-Induced STAT Inhibitor 1) and RGS1 (Regulator Of G-Protein Signaling 1) were also expressed in B cells in thymoma, but not in periphery (Supplementary Fig. 12b, c), suggesting that these genes were regulated by a shared tissue-specific program between T and B cells.