Consequently, the EGFR gene status could be classified as: (i) EGFR wild type in both primary tumour and metastasis (n=18 patients; 72%), and (ii) EGFR mutations detected only in the primary tumour (n=4 patients; 16%) or the metastases (n=2 patients; 8%) or both (n=1 patient; 4%). The gene discussed is EGFR; the disease is neoplasm.