Fig. 6

Relationship between adjuvant chemotherapy and prognosis. (a) Comparison of overall survival between patients with adjuvant chemotherapy and patients without adjuvant chemotherapy. (b) Comparison of recurrence-free survival between patients with adjuvant chemotherapy and patients without adjuvant chemotherapy. (c) Comparison of effects of adjuvant chemotherapy and non-chemotherapy on overall survival in adenocarcinoma-dominant-type patients. (d) Comparison of effects of adjuvant chemotherapy and non-chemotherapy on overall survival in neuroendocrine carcinoma-dominant-type patients