Prognostic impact of number of examined lymph nodes on survival of patients with appendiceal neuroendocrine tumors

Figure 1 Survival curves for all patients and patients at different disease stages. A: Survival for all patients; B: Survival for patients at different stages.

Figure 2 Survival curves by tumor size and surgery type. A: Survival by tumor size; B: Survival by different surgeries.

Figure 3 Histogram of different surgery type and survival curves by different surgeries according to tumor size. A: Histogram of patients undergoing different surgeries; B: Survival curves by different surgeries for patients with tumor size ≤ 2 cm; C: Survival curves by different surgeries for patients with tumor size > 2 cm.

Figure 4 Lymph node status according to tumor size. The chi-squared test showed significant difference (χ² = 378.16, P < 0.001).

Figure 5 Survival curves by cutoff points of examined lymph nodes. A: All patients; B: Node-negative patients; C: Node-positive patients. ELN: Examined lymph nodes.

Figure 6 Survival curves by lymph node ratio for node-positive patients. LNR: Lymph node ratio (the ratio of positive lymph nodes to the total lymph nodes examined).