EGFR and neoplasm: As shown in Fig. 1, the tumor presented a loss of chromosome 10 (mean log ratio: − 0.446) and a partial loss of the short arm of chromosome 9 (9p24.1-p21.2, mean log ratio: − 0.385) including the homozygous deletion of CDKN2A gene (arrow, mean log ratio: − 1.155) and a gain in chromosome 7 (mean log ratio: 0.376) including the amplification of EGFR gene (arrow, mean log ratio: 3.642).