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Related Concept Videos

Chronic Bowel Disorders: Introduction01:17

Chronic Bowel Disorders: Introduction

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Chronic bowel diseases are a group of long-term conditions affecting the digestive tract, characterized by inflammation and damage to the gut lining. These conditions primarily include irritable bowel syndrome and inflammatory bowel disease.
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Related Experiment Video

Updated: Apr 25, 2026

Intraoperative Strategy under Complex Vascular Adhesion for Laparoscopic Radical Resection of Bismuth-Corlette Type IIIb Perihilar Cholangiocarcinoma
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Intrahepatic Biliary Stricture Following Carbon-Ion Radiotherapy: A Narrative Review.

Hideo Kidogawa1, Takahito Tagami1, Takeshi Konno1

  • 1Department of Surgery, Kitakyushu City Yahata Hospital, Fukuoka, JPN.

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|April 24, 2026
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Summary
This summary is machine-generated.

Carbon-ion radiotherapy (CIRT) for liver tumors can cause late-onset intrahepatic biliary strictures, especially in high-risk patients. Careful monitoring and dose constraints are crucial to prevent severe complications like liver failure.

Keywords:
carbon-ion radiotherapydosimetric constraintshepatocellular carcinomaintrahepatic biliary stricturelate radiation toxicity

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Area of Science:

  • Oncology
  • Radiation Oncology
  • Hepatology

Background:

  • Carbon-ion radiotherapy (CIRT) offers dose conformity advantages for liver tumors.
  • Limited data exists on specific risks like intrahepatic biliary strictures following CIRT.
  • Understanding biliary complications is crucial for patient safety in liver cancer treatment.

Purpose of the Study:

  • To review and synthesize existing evidence on intrahepatic biliary strictures after CIRT for liver tumors.
  • To identify risk factors and clinical outcomes associated with these strictures.
  • To highlight the importance of monitoring and dosimetric constraints in high-risk patients.

Main Methods:

  • A narrative literature review was conducted.
  • Focused search across academic databases for studies on CIRT and biliary complications.
  • Qualitative synthesis due to clinical heterogeneity and limited sample sizes.

Main Results:

  • Intrahepatic biliary strictures are a late-onset complication of CIRT.
  • An 11% incidence was noted in a subgroup with unresectable hepatocellular carcinoma (HCC) and Child-Pugh B cirrhosis.
  • Risk factors include perihilar tumors, macrovascular invasion, high radiation doses (biliary V10% ≥ 40 Gy RBE), and proximity to biliary structures.

Conclusions:

  • CIRT has a generally acceptable safety profile but carries risks of severe biliary strictures.
  • These strictures can lead to liver function deterioration and fatal outcomes (1-2% grade 5 toxicities).
  • Close monitoring and adherence to dosimetric constraints are essential for high-risk patients undergoing CIRT.