CRP and lung cancer: Recently, numerous studies have investigated the ability of nutrition and inflammatory indices to predict the prognosis in patients diagnosed with metastatic lung cancer, including the prognostic nutritional index (PNI)3, advanced lung cancer inflammation index (ALI)4, neutrophil/lymphocyte ratio (NLR)5, platelet/lymphocyte ratio (PLR)6, Glasgow Prognostic Score (GPS)7, and C-reactive protein/albumin ratio (CAR)8.