Gal-9 roles have been examined in different types of lung cancers, including non-small cell lung cancer (NSCLC) [188], small cell lung cancer (SCLC) [189], lung large cell neuroendocrine carcinoma (LCNEC) [190], and pulmonary sarcomatoid carcinoma (PSC) [191]. The gene discussed is LGALS9; the disease is small cell lung carcinoma.