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Biliary stent replacement cytology

A Simsir1, E Greenebaum, P D Stevens

  • 1Department of Pathology, Columbia Presbyterian Medical Center, College of Physicians and Surgeons of Columbia University, New York, NY 10032, USA.

Diagnostic Cytopathology
|March 1, 1997
PubMed
Summary
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Biliary stent replacement cytology (BSRC) improves cancer detection sensitivity by analyzing cells from removed stents. This method is valuable when other diagnostic techniques are inconclusive for biliary strictures.

Area of Science:

  • Gastroenterology
  • Cytopathology
  • Oncology

Background:

  • Bile duct stenosis often recurs, necessitating stent replacement.
  • Conventional biliary cytology has limitations in sensitivity for diagnosing malignancy.
  • Cells accumulating on biliary stents may offer a diagnostic advantage.

Purpose of the Study:

  • To evaluate the diagnostic utility of analyzing cells from removed biliary stents (BSRC).
  • To determine the sensitivity and specificity of BSRC in detecting malignancy in biliary strictures.

Main Methods:

  • Collected saline rinses from 11 removed polyethylene biliary stents.
  • Processed rinse material via centrifugation, smearing, and Papanicolaou staining.
  • Applied BSRC in patients with choledocholithiasis and suspected hepatobiliary/pancreatic carcinoma.

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Main Results:

  • BSRC detected malignant cells in 6 of 8 patients with malignant biliary strictures (75% sensitivity, 100% specificity).
  • Malignant cells appeared as loose clusters or singly, with reparative epithelial atypia also noted.
  • BSRC was negative for malignancy in patients with choledocholithiasis or benign biliary strictures.

Conclusions:

  • Sampling cells from biliary stents enhances the sensitivity of biliary cytology.
  • BSRC is particularly useful for inoperable patients, non-diagnostic biopsies, inconclusive prior cytology, and when a permanent metal stent is required.