For example, PTK2 figured significantly in breast cancer (BRCA), three kidney cancer data sets [kidney chromophobe (KICH), kidney renal clear cell carcinoma (KIRC) and kidney renal papillary cell carcinoma (KIRP)], and thymoma (THYM), while PRKDC has distinct patterns in seven cancer studies. The gene discussed is PTK2; the disease is thymoma.