In NSCLC patients of East Asian descent, lung adenocarcinomas had a markedly higher rate of ALK rearrangements than squamous cell carcinomas, while this was not the case in Caucasians, likely due to more cases of squamous cell carcinoma in Caucasians than East Asians (2.1% versus 0.8%). This evidence concerns the gene ALK and non-small cell lung carcinoma.