The HGF/c-MET complex was detected in 7 of 13 (54%) NSCLC specimens (NL1, NL4, NL5, NL6, NL11, NL15), 3 of 6 (50%) gastric tumors (G2, G3, G5), and 11of 33 (33%) HN tumors (HN1, HN5, HN7, HN8, HN12, HN15, HN16, HN21, HN25, HN26, HN33). This evidence concerns the gene MET and non-small cell lung carcinoma.