Fig. 7From: Prognostic value of the extent of lymphadenectomy for esophageal cancer-specific survival among T1 patientsEsophageal CSS curve for different LNRs based on the two grouping methods. a: 0, 0.01–0.05, 0.06–0.20 and ≥ 0.21; b: ≤0.05 and > 0.05Back to article page