Fig. 3From: Prognostic value of the extent of lymphadenectomy for esophageal cancer-specific survival among T1 patientsEsophageal CSS curve for different nLNEs based on two grouping methods. a: ≤4, 5–8, 9–13, 14–20 and ≥ 21; b: < 14 and ≥ 14Back to article page