{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,11,28]],"date-time":"2025-11-28T17:22:05Z","timestamp":1764350525019,"version":"3.40.5"},"reference-count":24,"publisher":"Wiley","issue":"4","license":[{"start":{"date-parts":[[2019,12,26]],"date-time":"2019-12-26T00:00:00Z","timestamp":1577318400000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"DOI":"10.13039\/501100003399","name":"Science and Technology Commission of Shanghai Municipality","doi-asserted-by":"publisher","award":["16411952000"],"award-info":[{"award-number":["16411952000"]}],"id":[{"id":"10.13039\/501100003399","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/501100001809","name":"National Natural Science Foundation of China","doi-asserted-by":"publisher","award":["81872352"],"award-info":[{"award-number":["81872352"]}],"id":[{"id":"10.13039\/501100001809","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":["onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["Cancer Medicine"],"published-print":{"date-parts":[[2020,2]]},"abstract":"<jats:title>Abstract<\/jats:title><jats:sec><jats:title>Background<\/jats:title><jats:p>The distant metastasis (DM) mode and treatment efficacies in the advanced biliary tract cancer (BTC) were obscure, and a credible evaluation is urgently needed.<\/jats:p><\/jats:sec><jats:sec><jats:title>Method<\/jats:title><jats:p>A total of 6348 advanced BTC patients (ICC, intrahepatic cholangiocarcinoma, n\u00a0=\u00a01762; PHCC, perihilar cholangiocarcinoma, n\u00a0=\u00a01103; GBC, gallbladder cancer, n\u00a0=\u00a02580; DCC, distal cholangiocarcinoma, n\u00a0=\u00a0538; AVC, carcinoma of Vater ampulla, n\u00a0=\u00a0365) were enrolled from the Surveillance, Epidemiology, and End Results (SEER) database. Propensity score matching (PSM) process was carried out for less bias.<\/jats:p><\/jats:sec><jats:sec><jats:title>Result<\/jats:title><jats:p>The proportion of M1 patients in each subtype at first diagnosis was 26.4% (ICC), 37.2% (PHCC), 41. 0% (GBC), 24.5% (DCC), and 12.7% (AVC), and the constitution of DM sites in different subtypes varied apparently. Moreover, the survival of metastasis sites was different (<jats:italic>P<\/jats:italic>\u00a0&lt;\u00a0.05 in all the subtypes) where the multi\u2010metastasis and distant lymph node (dLN) only always indicated the worst and best prognosis, respectively. Chemotherapy presented the most significant survival impact with the lowest hazard ratio by multivariate cox model and still provided a survival improvement after PSM (all <jats:italic>P<\/jats:italic>\u00a0&lt;\u00a0.001) in all subtypes. However, the median months manifested different between patients with and without chemotherapy among the subtypes (ICC, from 5 to 9; PHCC, from 6 to 10; AVC, from 4 to 9; GBC, from 6 to 7; DCC from 6 to 8).<\/jats:p><\/jats:sec><jats:sec><jats:title>Conclusion<\/jats:title><jats:p>We provided a landscape about the detailed DM mode of the advanced BTC in a large population, found the survival differences among DM sites, and revealed the different chemotherapy efficacies in the BTC subtypes.<\/jats:p><\/jats:sec>","DOI":"10.1002\/cam4.2794","type":"journal-article","created":{"date-parts":[[2019,12,26]],"date-time":"2019-12-26T16:05:14Z","timestamp":1577376314000},"page":"1335-1348","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":15,"title":["Landscape of distant metastasis mode and current chemotherapy efficacy of the advanced biliary tract cancer in the United States, 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