[Percutaneous transhepatic cholangioscopy (PTCS)--evaluating the clinical status]

Area of Science:

• Gastroenterology and Hepatology
• Interventional Radiology
• Oncology

Context:

• Biliary obstructions present diagnostic challenges, often requiring invasive procedures.
• Percutaneous transhepatic biliary drainage (PTCD) is a standard procedure for biliary decompression.
• Evaluating the utility of cholangioscopy in conjunction with drainage procedures is crucial.

Purpose:

• To assess the efficacy and diagnostic yield of percutaneous transhepatic cholangioscopy (PTCS) during percutaneous transhepatic biliary drainage (PTCD) in patients with biliary obstructions.
• To compare the diagnostic accuracy of PTCS-guided biopsies with brush cytology for detecting hepatic and pancreatic malignancies.
• To evaluate the ability of PTCS to identify tumor extent compared to endoscopic retrograde cholangiopancreatography (ERCP).

Summary:

• Percutaneous transhepatic cholangioscopy (PTCS) was performed in 44 patients undergoing percutaneous transhepatic biliary drainage (PTCD) for biliary obstructions.
• Of 30 patients with suspected malignancies, PTCS-guided biopsies showed insufficient histology in 33%, contrasting with brush cytology's 14% false negative rate.
• Crucially, PTCS identified more extensive tumor sites in 3 cases than initially visualized by ERCP.

Impact:

• PTCS offers a valuable adjunct to PTCD for diagnosing biliary tract and pancreatic malignancies.
• The findings highlight the potential for PTCS to improve tumor staging and guide treatment decisions.
• This study underscores the importance of direct visualization in complex biliary obstruction cases.