FGF18 and neoplasm: The expression level of FGF18 protein in tumor tissues of 12 non-small cell lung cancer (NSCLC) patients was significantly higher than that in adjacent non-tumor tissues, and with the increase of FGF18 expression, the prognosis, tumor differentiation and tumor-lymph node metastasis (TNM) stage of NSCLC patients were all in the poor direction (126).