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Related Concept Videos

Endoscopic Procedures V: ERCP01:26

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Related Experiment Video

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Percutaneous Endobiliary Cryobiopsy in Biliary Obstruction: Randomised Study (BICRYOB).

Tomáš Rohan1, Barbora Hanžlová1, Peter Matkulčík1

  • 1Department of Radiology and Nuclear Medicine, University Hospital Brno and Masaryk University Brno, Jihlavská 340/20, 625 00, Brno, Czechia.

Cardiovascular and Interventional Radiology
|December 4, 2025
PubMed
Summary
This summary is machine-generated.

Endobiliary cryobiopsy is a safe and feasible technique for diagnosing biliary stenosis, yielding larger and higher-quality tissue samples than traditional forceps biopsy.

Keywords:
Biliary obstructionCryobiopsyRandomised study

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Area of Science:

  • Gastroenterology
  • Interventional Endoscopy
  • Oncology

Background:

  • Biliary stenosis diagnosis often relies on tissue sampling.
  • Standard endobiliary forceps biopsy has limitations in sample adequacy.

Purpose of the Study:

  • To compare the feasibility and technical outcomes of endobiliary cryobiopsy versus standard endobiliary forceps biopsy.
  • To evaluate diagnostic yield and sample quality between the two biopsy techniques.

Main Methods:

  • A prospective randomized study involving 22 patients with indeterminate biliary stenosis.
  • Patients underwent both percutaneous endoluminal forceps biopsy and endoluminal cryobiopsy.
  • Technical feasibility, complication rates, sensitivity, sample characteristics, and pathologist-assessed quality were compared.

Main Results:

  • Cryobiopsy was technically feasible in all patients with no serious complications.
  • Cryobiopsy demonstrated higher sensitivity (88% vs 65%) and accuracy (89% vs 68%) in detecting malignancy.
  • Cryobiopsy yielded significantly larger, artifact-free tissue samples with superior quality and weight compared to forceps biopsy.

Conclusions:

  • Endobiliary cryobiopsy is a safe and feasible alternative for tissue acquisition in the biliary tract.
  • Cryobiopsy provides more representative histological samples than conventional forceps biopsy.
  • This technique enhances diagnostic accuracy for indeterminate biliary strictures.