Impact of lymph node metastasis on survival in patients with pathological T1 carcinoma of the ampulla of Vater.

To determine the prognostic factors for patients with pathological T1 (pT1) carcinoma of the ampulla of Vater, 36 consecutive patients with carcinoma of the ampulla of Vater who underwent surgery were retrospectively analyzed in terms of clinicopathological features. The overall 5-year Kaplan-Meier survival in all patients was 50.2%, and the median survival of all patients was 64.0 months. Factors favorably influencing a long-term outcome were the absence of lymph node metastasis (P < 0.0001), the absence of ulcer formation of the tumor (P = 0.0062), and the absence of tumor invasion into the duodenum (P = 0.0025) and the pancreas (P = 0.0098). In a multivariate analysis, lymph node metastasis was the only predictor of survival (P = 0.0023). In the pT1 stage patients, 20% of the patients had lymph node metastasis, and their survival was statistically poor compared to the pT1 patients without lymph node metastasis (P = 0.017). As for survival after the operation, there was no significant difference between pancreatoduodenectomy and pylorus-preserving pancreatoduodenectomy.