Subsequently, in a pilot study carried out on the egfr microsatellite CA-SSR-1 performed by the first genetic analyzer available in pathology, Thermo Fisher's 3130 genetic analyzer, we were able to show that CA-SSR-1 allelic imbalance with short allele relative prevalence significantly correlated with EGFR 3+ immunohistochemical scores, increased egfr gene copy numbers, and advanced stage with relapsing/metastatic behavior in thymomas (44). The gene discussed is EGFR; the disease is thymoma.