Annals of surgical oncology · 2024
Comparison of Ampullary and Pancreatic Adenocarcinomas: Smaller Invasion, Common Adenomatous Components, Resectability, and Histology are Factors for Improved Survival for Patients with Ampullary Adenocarcinoma.
СтатьяСравнительное исследованиеНазвание и аннотация: Перевод в очереди
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Memis Bahar, Saka Burcu, Pehlivanoglu Burcin, Kim Grace, Balci Serdar, Tajiri Takuma, Ohike Nobuyuki, Bagci Pelin, Akar Kadriye Ebru, Muraki Takashi, Jang Kee-Taek, Maithel Shishir K, Sarmiento Juan, Kooby David A, Esmer Rohat, Tarcan Zeynep Cagla, Goodman Michael, Xue Yue, Krasinskas Alyssa, Reid Michelle, Basturk Olca, Adsay Volkan
Аннотация
BACKGROUND: The information on the clinicopathologic/outcome differences between ampullary adenocarcinoma (AC) and pancreatic adenocarcinoma (PC) has been conflicting to the extent that it still is questioned whether ACs need to be recognized separately from PCs.
METHODS: The characteristics of 413 ACs were compared with those of 547 PCs.
RESULTS: The ACs had a better prognosis than the PCs (5-year survival, 57 % vs 23 %; p < 0.001). Even the pancreatobiliary (PB)-type ACs had a better prognosis (5-year survival, 46 % vs 23 %; p < 0.001). Several differences also were identified as contributing factors: (1) the preinvasive adenomatous component often constituted a significant proportion of the mass in ACs (>50 % of the tumor in 16 % vs 1.5 %; p < 0.001); (2) the mean size of the carcinoma was smaller in ACs (2.5 vs 3.2 cm; p < 0.001): when matched for invasion size, the survival advantage of AC was minimized, and when matched for invasion size larger than 2 cm, the survival advantage of AC lost its statistical significance; (3) lymph node (LN) metastases were less common in ACs (49 % vs 71 %; p < 0.001); (4) the definitive R1 rate was lower in ACs (4 % vs 23.5 %; p < 0.001); and (5) non-PB and non-tubular adenocarcinoma types were more common in ACs (17 % vs 3 %; p < 0.001).
CONCLUSIONS: Comparatively, ACs have better clinical survival than PCs. Potential contributing factors are the relative abundance of the preinvasive component, smaller invasion, lower LN metastasis rate, higher resectability, and common occurrence of less aggressive histologic phenotypes (intestinal, medullary, mucinous). However, this survival advantage is sustained even in PB-type ACs, highlighting the importance of accurately determining the site of origin.
METHODS: The characteristics of 413 ACs were compared with those of 547 PCs.
RESULTS: The ACs had a better prognosis than the PCs (5-year survival, 57 % vs 23 %; p < 0.001). Even the pancreatobiliary (PB)-type ACs had a better prognosis (5-year survival, 46 % vs 23 %; p < 0.001). Several differences also were identified as contributing factors: (1) the preinvasive adenomatous component often constituted a significant proportion of the mass in ACs (>50 % of the tumor in 16 % vs 1.5 %; p < 0.001); (2) the mean size of the carcinoma was smaller in ACs (2.5 vs 3.2 cm; p < 0.001): when matched for invasion size, the survival advantage of AC was minimized, and when matched for invasion size larger than 2 cm, the survival advantage of AC lost its statistical significance; (3) lymph node (LN) metastases were less common in ACs (49 % vs 71 %; p < 0.001); (4) the definitive R1 rate was lower in ACs (4 % vs 23.5 %; p < 0.001); and (5) non-PB and non-tubular adenocarcinoma types were more common in ACs (17 % vs 3 %; p < 0.001).
CONCLUSIONS: Comparatively, ACs have better clinical survival than PCs. Potential contributing factors are the relative abundance of the preinvasive component, smaller invasion, lower LN metastasis rate, higher resectability, and common occurrence of less aggressive histologic phenotypes (intestinal, medullary, mucinous). However, this survival advantage is sustained even in PB-type ACs, highlighting the importance of accurately determining the site of origin.