EGFR and non-small cell lung carcinoma: Previous studies have proposed that markers based on the test results in peripheral blood, including neutrophil to lymphocyte and platelet to lymphocyte ratios and Prognostic Nutritional Index, have yielded encouraging results in the prognostication of advanced NSCLC (10), but their role in patients with early-stage NSCLC is unclear, especially in those with EGFR alterations.