What is endobiliary RFA?
Endobiliary radiofrequency ablation is a treatment delivered through a specialized intraductal catheter — most commonly the Habib EndoHPB — placed across a narrowing inside the bile duct. Once in position under live X-ray guidance, radiofrequency energy is delivered in short, controlled cycles. The energy creates a localized thermal lesion that destroys tumor tissue or breaks up dense fibrotic scar lining the duct, without injuring deeper structures.1
At Florida Interventional Specialists, endobiliary RFA is performed percutaneously through an existing biliary drainage tract under live fluoroscopic guidance. The choice of where and how to treat is made in coordination with the multidisciplinary biliary team based on each patient’s anatomy, prior surgeries, and treatment plan.
Why this approach — for malignant and benign disease
For malignant strictures, RFA targets tumor lining the duct so the duct stays open longer and biliary stents resist tumor ingrowth.2 For benign strictures that haven’t responded to repeated balloon dilations and stent exchanges, RFA can break the cycle by remodeling the dense scar tissue causing the obstruction — giving stenting a better chance to hold long-term.3 In both situations, fewer repeat procedures means a better quality of life.
How the procedure works
Endobiliary RFA is performed in a hospital interventional suite under sedation. Through an existing biliary drainage tract, the radiofrequency catheter is advanced and positioned across the stricture under live fluoroscopic guidance. Energy is delivered for short cycles — typically two minutes at a time — covering the length of the diseased segment. After ablation, a biliary stent is usually placed across the treated area to maintain drainage. Total procedure time is approximately 60 to 90 minutes. Most patients are discharged the same day or after one night of observation.
Who is a good candidate?
Endobiliary RFA is considered for patients with both malignant and benign biliary strictures when standard treatment alone is not adequate.
Malignant indications:
- Cholangiocarcinoma — intrahepatic, perihilar (Klatskin tumor), or distal — when surgical resection isn’t possible
- Pancreatic head cancer with biliary obstruction
- Ampullary cancer and gallbladder cancer causing obstruction
- Tumor ingrowth into a previously placed biliary stent causing recurrent blockage2
- Selected patients with intraductal papillary neoplasm of the bile duct (IPNB) or biliary intraepithelial neoplasia
Benign indications:
- Recalcitrant benign biliary strictures that have failed multiple sessions of balloon dilation and stenting
- Anastomotic biliary strictures after Whipple, hepaticojejunostomy, or other biliary-enteric reconstruction
- Post-liver-transplant biliary strictures — both anastomotic and non-anastomotic
- Dominant strictures in primary sclerosing cholangitis (PSC) when balloon dilation alone has not held
- Post-cholecystectomy biliary strictures from prior bile duct injury or surgical clips
Candidacy is always determined together with the multidisciplinary hepatobiliary team. For malignant disease, endobiliary RFA is integrated with chemotherapy, targeted therapy (such as pemigatinib for FGFR2 fusion-positive cholangiocarcinoma), immunotherapy, and sometimes external beam radiation.4 For benign disease, RFA is one tool within a broader plan of dilation, stent management, and treating the underlying cause.
Who performs endobiliary RFA
Endobiliary RFA is performed by interventional radiologists through an existing percutaneous biliary drainage tract under live image guidance. At Florida Interventional Specialists, every endobiliary RFA case is delivered as part of a coordinated plan with referring hepatobiliary surgery, hepatology, transplant hepatology, medical oncology, and radiation oncology teams across Tampa Bay.
References
- Steel AW, Postgate AJ, Khorsandi S, et al. Endoscopically applied radiofrequency ablation appears to be safe in the treatment of malignant biliary obstruction. Gastrointest Endosc. 2011;73(1):149–153.
- Sofi AA, Khan MA, Das A, et al. Radiofrequency ablation combined with biliary stent placement versus stent placement alone for malignant biliary strictures: a systematic review and meta-analysis. Gastrointest Endosc. 2018;87(4):944–951.
- Hu B, Gao DJ, Yu FH, et al. Endoscopic radiofrequency ablation for refractory benign biliary strictures: pilot feasibility study. Dig Endosc. 2014;26(4):581–585.
- Vogel A, Bridgewater J, Edeline J, et al. Biliary tract cancer: ESMO Clinical Practice Guideline for diagnosis, treatment and follow-up. Ann Oncol. 2023;34(2):127–140.
Frequently asked questions
What is endobiliary RFA?
Endobiliary radiofrequency ablation is an image-guided treatment that delivers heat directly inside the bile ducts. It’s used to destroy tumor tissue lining the duct in cancer-related strictures, and to remodel stubborn scar tissue in benign strictures that haven’t responded to standard balloon dilation and stenting.
Is endobiliary RFA only for cancer?
No. Endobiliary RFA is used for both malignant and benign biliary strictures. Malignant indications include cholangiocarcinoma, pancreatic head cancer, ampullary cancer, gallbladder cancer, and tumor ingrowth into a previously placed biliary stent. Benign indications include recalcitrant strictures that have failed repeated balloon dilation and stenting — most commonly anastomotic strictures after Whipple or liver transplant, post-cholecystectomy strictures, and dominant PSC strictures.
How is endobiliary RFA different from regular RFA?
Endobiliary RFA delivers energy from inside the bile duct using a specialized intraductal catheter, rather than from outside the body. It treats the inner surface of the duct without injuring nearby liver, blood vessels, or organs. The most widely used device is the Habib EndoHPB bipolar catheter.
Does endobiliary RFA help my biliary stent last longer?
For malignant strictures, published series and meta-analyses suggest that adding endobiliary RFA to stent placement prolongs stent patency by reducing tumor ingrowth. For benign strictures, the goal is similar: by treating the dense scar that keeps the stricture from holding open, RFA can reduce the frequency of repeat dilations and stent exchanges.
Is endobiliary RFA painful?
The procedure is performed under sedation, so you won’t feel the ablation. Mild discomfort at the catheter access site or upper abdomen is typical for several days afterward and is usually well-controlled with the medications you may already be taking.
Who performs endobiliary RFA?
At Florida Interventional Specialists, endobiliary RFA is performed by board-certified interventional radiologists percutaneously through an existing biliary drainage tract. The decision to use endobiliary RFA — and the broader management of your biliary disease — is made together with hepatobiliary surgery, hepatology, transplant hepatology, medical oncology, and radiation oncology.
