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This study aimed to evaluate the prognostic value of hypoalbuminemia alone in patients with BTC, with stratified analyses according to tumor type, treatment and sex.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Methods<\/jats:title>\n                    <jats:p>A retrospective regional referral center cohort study was conducted, including consecutive patients with a measurement of preoperative albumin and intended resection of suspected BTC: intrahepatic cholangiocarcinoma (iCCA), perihilar cholangiocarcinoma (pCCA) or gallbladder cancer (GBC) between 2009 and 2017. The primary outcome was overall survival (OS), analyzed by Kaplan-Meier estimate and Cox regression.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Results<\/jats:title>\n                    <jats:p>\n                      Out of 221 patients, 191 underwent resection, while 30 patients were diagnosed with unresectable BTC (14%). In the resection group, 147 patients had confirmed BTC, while 44 (20%) were postoperatively diagnosed with a benign lesion. Hypoalbuminemia (&lt;\u200935\u00a0g\/L) was more frequent in pCCA (75%) and GBC (59%), compared to iCCA (34%,\n                      <jats:italic>p<\/jats:italic>\n                      \u2009&lt;\u20090.001). The preoperative albumin level was positively associated with resectability (\n                      <jats:italic>p<\/jats:italic>\n                      \u2009=\u20090.025). In patients with resection, hypoalbuminemia was associated with a tumor positive resection margin (\n                      <jats:italic>p<\/jats:italic>\n                      \u2009&lt;\u20090.001). Hypoalbuminemia was a negative prognostic factor in resectable (\n                      <jats:italic>p<\/jats:italic>\n                      \u2009&lt;\u20090.001) and unresectable BTC (\n                      <jats:italic>p<\/jats:italic>\n                      \u2009&lt;\u20090.001), and in both women (\n                      <jats:italic>p<\/jats:italic>\n                      \u2009=\u20090.002) and men (\n                      <jats:italic>p<\/jats:italic>\n                      \u2009=\u20090.004). Hypoalbuminemia was negatively associated with OS in iCCA (\n                      <jats:italic>p<\/jats:italic>\n                      \u2009&lt;\u20090.001) and GBC (\n                      <jats:italic>p<\/jats:italic>\n                      \u2009=\u20090.022), but not in pCCA (\n                      <jats:italic>p<\/jats:italic>\n                      \u2009=\u20090.210).\n                    <\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Conclusion<\/jats:title>\n                    <jats:p>Preoperative albumin was prognostic for survival in patients with iCCA and GBC, in both women and men and regardless of tumor resectability. Patients with pCCA more often had low albumin, and hypoalbuminemia alone was not prognostic in this subgroup.<\/jats:p>\n                  <\/jats:sec>","DOI":"10.1007\/s00432-025-06408-2","type":"journal-article","created":{"date-parts":[[2026,1,8]],"date-time":"2026-01-08T14:29:04Z","timestamp":1767882544000},"update-policy":"https:\/\/doi.org\/10.1007\/springer_crossmark_policy","source":"Crossref","is-referenced-by-count":1,"title":["Hypoalbuminemia as a prognostic marker for survival in biliary tract cancer: associations with tumor type, treatment and sex"],"prefix":"10.1007","volume":"152","author":[{"given":"Mostafa","family":"Abdulrazzak","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Linda","family":"Bj\u00f6rkhem-Bergman","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Christina","family":"Villard","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Marco","family":"Gerling","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Tina","family":"Gustavell","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Hannes","family":"Jansson","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"297","published-online":{"date-parts":[[2026,1,8]]},"reference":[{"issue":"1","key":"6408_CR25","doi-asserted-by":"publisher","first-page":"e0190410","DOI":"10.1371\/journal.pone.0190410","volume":"13","author":"FC Alves","year":"2018","unstructured":"Alves FC, Sun J, Qureshi AR, Dai L, Snaedal S, Barany P et al (2018) The higher mortality associated with low serum albumin is dependent on systemic inflammation in end-stage kidney disease. 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