By immunohistochemistry, expression of galectin-7 was analyzed in 308 cases of lung cancer; 108 cases of adenocarcinoma, 193 cases of squamous cell lung carcinoma and 7 cases of small cell lung cancer (SCLC) and correlated with clinicopathological characteristics as well as patients’ overall survival. Here, LGALS7 is linked to small cell lung carcinoma.