To identify copy number alterations (CNAs) of general importance in lung adenocarcinoma, which may serve as basis for supervised comparisons between EGFR-mutated, KRAS-mutated and EGFRwt/KRASwt tumors, we analyzed 1272 tumors and cell lines profiled by SNP or aCGH microarrays (Figure 2A, Table 1). The gene discussed is KRAS; the disease is lung adenocarcinoma.