Comparing paired tumor and non-tumor tissues from 20 LAC and 10 squamous cell lung carcinoma (SCLC) surgical specimens (Figure 1C), we found higher levels of CHRNA5 mRNA in tumor than in adjacent non-tumor tissues in LAC specimens; however, this differential expression pattern was not observed in SCLC samples. The gene discussed is CHRNA5; the disease is squamous cell lung carcinoma.