{
  "abstract": "In patients with unresectable malignant biliary obstruction, brachytherapy combined with self-expandable metal stents (SEMS) has demonstrated extended stent patency and survival. However, researches rarely evaluate the outcomes of brachytherapy combined with subsequent systemic therapy, and most obstruction sites are located in the hilar bile ducts. The extrahepatic biliary tract lacks intrinsic structural support, limiting the application of locoregional therapies and predisposing to rapid clinical deterioration if drainage is delayed. The purpose of this study is to investigate the utility of SEMS combined with 125I brachytherapy in the treatment of unresectable malignant distal biliary obstruction (MDBO), providing evidence to guide locoregional management of this patient population. This study retrospectively enrolled 187 patients first diagnosed with unresectable MDBO undergoing SEMS treatment at our center between August 2020 and July 2024. The brachytherapy group simultaneously received iodine-125 seed implantation (53 patients), while the control group received only SEMS placement (134 patients). We collected comprehensive clinicopathological data, including demographics, tumor characteristics, hepatic function, Eastern Cooperative Oncology Group (ECOG) performance status, and subsequent anticancer therapies. The study endpoints included overall survival and stent patency time. The duration of patency and overall survival was calculated using the Kaplan-Meier method, and the risk factors were assessed using the Cox proportional hazards models. The stent patency in the brachytherapy group was significantly longer than that in the control group [275 and 168 days, hazard ratio (HR) =0.50, 95% confidence interval (CI): 0.29-0.88, P=0.01]. The overall survival in the brachytherapy group was significantly longer than that in the control group (208 and 152 days, HR =0.60, 95% CI: 0.39-0.93, P=0.02). Furthermore, the combination of brachytherapy and subsequent systemic therapy significantly improved both stent patency (P=0.02) and overall survival (P=0.001) compared to monotherapy. 125I brachytherapy appears more effective than stent placement alone in regard to stent dysfunction and survival in this MDBO cohort. Moreover, 125I brachytherapy followed by subsequent systemic therapy is associated with further extensions in patient survival and stent patency.",
  "abstract_shown": true,
  "affiliations": [
    "Department of Minimally Invasive & Interventional Radiology, State Key Laboratory of Oncology in South China, Guangdong Provincial Clinical Research Center for Cancer, Sun Yat-sen University Cancer Center, Guangzhou, China.",
    "Department of Radiology, Third Affiliated Hospital of Sun Yat-sen University, Guangzhou, China."
  ],
  "article_type": "research article",
  "arxiv": null,
  "author_total": 8,
  "authors": [
    {
      "affs": [
        0
      ],
      "name": "Lijie Qiu",
      "orcid": "0000-0002-9767-0240"
    },
    {
      "affs": [
        0
      ],
      "name": "Zhenkang Qiu"
    },
    {
      "affs": [
        0
      ],
      "name": "Xiaobo Fu"
    },
    {
      "affs": [
        0
      ],
      "name": "Yuzhe Cao"
    },
    {
      "affs": [
        0
      ],
      "name": "Zixiong Chen"
    },
    {
      "affs": [
        0
      ],
      "name": "Maoyuan Mu"
    },
    {
      "affs": [
        1
      ],
      "name": "Chen Liu"
    },
    {
      "affs": [
        0
      ],
      "name": "Fei Gao"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/cf9vs7110f1xr.bib",
  "cited_by": 0,
  "doi": "10.21037/jgo-2026-0669",
  "fulltext_url": "https://europepmc.org/articles/PMC13740521",
  "id": "cf9vs7110f1xr",
  "issns": [
    "2078-6891",
    "2219-679X"
  ],
  "landing_url": "https://europepmc.org/article/MED/42996843",
  "language": "eng",
  "licence": "CC-BY-NC-ND",
  "licence_label": "CC BY-NC-ND",
  "licence_source": "article",
  "licence_url": "https://creativecommons.org/licenses/by-nc-nd/4.0/",
  "metadata_licence": null,
  "native_subjects": [
    [
      "heading",
      "Original Article"
    ],
    [
      "openalex",
      "2715|Gallbladder and Bile Duct Disorders"
    ]
  ],
  "openalex": "W7224130665",
  "pdf_url": "https://europepmc.org/articles/PMC13740521?pdf=render",
  "pmcid": "PMC13740521",
  "pmid": "42996843",
  "published": "2026-08-25",
  "publisher": "AME Publications",
  "ris": "https://research.draconitic.com/paper/cf9vs7110f1xr.ris",
  "sources": [
    {
      "first_seen": "2026-11-09T15:20:42Z",
      "native_id": "MED:42996843",
      "source": "europepmc",
      "url": "https://europepmc.org/article/MED/42996843"
    },
    {
      "first_seen": "2026-11-10T12:21:45Z",
      "native_id": "PMC13740521",
      "source": "pmc",
      "url": "https://doi.org/10.21037/jgo-2026-0669"
    }
  ],
  "subjects": [
    {
      "field": "medicine",
      "origin": "journal-openalex:2730|Gastric Cancer Management and Outcomes",
      "subfield": "oncology"
    }
  ],
  "title": "Self-expandable metal stent (SEMS) with iodine-125 intraluminal brachytherapy versus SEMS alone for unresectable malignant distal biliary obstruction: survival and patency analysis.",
  "title_text": "Self-expandable metal stent (SEMS) with iodine-125 intraluminal brachytherapy versus SEMS alone for unresectable malignant distal biliary obstruction: survival and patency analysis.",
  "type": "peer-reviewed",
  "updated_at": "2026-11-10T12:21:45Z",
  "url": "https://research.draconitic.com/paper/cf9vs7110f1xr",
  "venue": "Journal of gastrointestinal oncology",
  "versions": []
}