The percentages of positive ALK rearrangement tests for nonsquamous NSCLC were 0 in Brazil, 3% in Italy, 5% in Spain and Germany, 8% in Japan, 15% in Australia, 16% in Korea; only 5 ALK rearrangement tests were run in Taiwan, of which 3 (60%) were positive. This evidence concerns the gene ALK and non-small cell lung carcinoma.