Collision tumor of the ampulla of Vater - Coexistence of neuroendocrine carcinoma and adenocarcinoma: report of a case

Herein, we present a case of coexisting neuroendocrine carcinoma and conventional adenocarcinoma (collision tumor) in the ampulla of Vater, which has seldom been reported in the literature. A 51-year-old man presented with a month history of jaundice. MRCP disclosed about 1.9x1.8 cm sized heterogeneously enhancing mass in ampulla of Vater, causing obstructions of distal common bile duct. He underwent pylorus-preserving pancreaticoduodenectomy under the diagnosis on ampulla of Vater cancer. Pathologically, sections on the ampulla of Vater showed conventional ductal adenocarcinoma extended and collided with poorly differentiated neuroendocrine carcinoma. In conclusion, we hereby presented a case of coexisting neuroendocrine carcinoma and conventional adenocarcinoma in the ampulla of Vater.

Impact of lymph node ratio as a valuable prognostic factor in gallbladder carcinoma, focusing on stage IIIB gallbladder carcinoma / 대한외과학회지

PURPOSE: It is increasingly being recognized that the lymph node ratio (LNR) is an important prognostic factor for gallbladder carcinoma patients. The present study evaluated predictors of tumor recurrence and survival in a large, mono-institutional cohort of patients who underwent surgical resection for gallbladder carcinoma, focusing specifically on the prognostic value of lymph node (LN) status and of LNR in stage IIIB patients. METHODS: Between 2004 and 2011, 123 patients who underwent R0 radical resection for gallbladder carcinoma at the Chonnam National University Hwasun Hospital were reviewed retrospectively. Patients were staged according to the American Joint Committee on Cancer 7th edition, and prognostic factors affecting disease free survival, such as age, sex, comorbidity, body mass index, presence of preoperative symptoms, perioperative blood transfusion, postoperative complications, LN dissection, tumor size, differentiation, lymph-vascular invasion, perineural invasion, T stage, presence of LN involvement, N stage, numbers of positive LNs, LNR and implementation of adjuvant chemotherapy, were statistically analyzed. RESULTS: LN status was an important prognostic factor in patients undergoing curative resection for gallbladder carcinoma. The total number of LNs examined was implicated with prognosis, especially in N0 patients. LNR was a powerful predictor of disease free survival even after controlling for competing risk factors, in curative resected gallbladder cancer patients, and especially in stage IIIB patients. CONCLUSION: LNR is confirmed as an independent prognostic factor in curative resected gallbladder cancer patients, especially in stage IIIB gallbladder carcinoma.

Effect on the Local Recurrence and the Survival of Total Mesorectal Excision and Lateral Pelvic Lymph Node Dissection in Rectal Cancer

PURPOSE: One of the most common sites of recurrence after a curative resection of rectal cancer is the pelvis, and local control is a major goal of surgical treatment. The advantages of lateral pelvic lymph node dissection are regarded as questionable because lateral pelvic lymph node metastasis does not occur so frequently and because a lateral lymphadenectomy has a negative influence on the postoperative quality of life. The aim of this study was to clarify if lateral pelvic lymph node dissection (LPLD) conferred any benefit. METHODS: A total of 769 patients who underwent curative surgery for rectal cancer between 1981 and 2005 at the Department of Surgery, OOO Hospital, were reviewed retrospectively. One hundred ninety-three of these patients underwent a lateral pelvic lymph node dissection, and 576 patients had a total mesorectal excision with high ligation of the IMA. RESULTS: There was no difference in pathological characteristics between the two groups. Patients who underwent a lateral pelvic lymph node dissection had no statistically significant difference in terms of the 5-year survival rate at stage II and III (64% vs 65% at stage II, P=0.391; 49% vs 47% at stage III, P=0.815). CONCLUSIONS: A lateral pelvic lymph node dissection has no advantage as part of a standard operation for rectal cancer. A total mesorectal excision alone has good local control and survival compared with a lateral pelvic lymph node dissection.