EGFR and neoplasm: When tumour location was considered as a dichotomous variable, EGFR gene amplification was still more common in proximally located tumours (distal oesophagus/GOJ/cardia versus gastric corpus/antrum/pylorus; (Fisher’s exact test, p = 0.016); OR 2.64, 95 % CI: 1.22–5.73).