Investigation of the Effect of Intraductal Radiofrequency Ablation in Inoperable Biliopancreatic Tumors Complicated With Obstructive Jaundice

INTRODUCTION

Biliary obstruction is the most relevant factor for survival and quality of life in patients suffering from primary bile duct malignancies or pancreatic head carcinoma. Due to their insidious course, these cancers are often diagnosed at an advanced stage. Thus, therapy is frequently restricted to palliative management. Within this setting, the prevention/treatment of biliary complications such as jaundice, cholangitis, or sepsis is one of the key therapeutic factors to extend survival and maintain quality of life (1-3). Endoscopic stenting of the biliary tract is now generally accepted as the primary approach to reestablish sufficient biliary drainage, provided approximately 50% of the liver parenchyma is drained (4). As the tumor grows, unfortunately, it often occurs that jaundice reappears despite primary stenting. Most oftenly this relates to unbridled tumor expansion leading to either stent-dysfunction by tumor ingrowth (through the mesh in case of metallic stenting of or via clogging of plastic stents) or either to extension in more proximal bile ducts/branches shutting of sufficient/adequate biliary drainage.

Given the context of incurable disease, a minimally-invasive strategy that could reduce the tumor burden in addition to stenting might be considered beneficial in terms of longer sustained bile duct drainage, and as such improve quality of life, more efficiently administered and better tolerated courses chemotherapy and delayed disease progression.

An example of such a potential minimal invasive strategy is RadioFrequency Ablation (RFA). It involves a modified electrocautery technique that has emerged among the many choices for local, minimally invasive tissue ablation. It has proven effective, versatile, and relatively inexpensive. RFA has been used for years in the treatment of cardiac dysrhythmias from aberrant conduction pathways, osteoid osteoma, prostate hypertrophy, and chronic pain (5-8). Recent clinical applications include tumor ablation in the liver (9-11), kidney (12,13) adrenal gland (14,15), bone (16), lung (17), and breast (18) as well as soft tissue debulking and pain palliation (19).

In the context of gastro-intestinal endoscopy, RFA has taken its place in the reduction of neoplastic progression of Barrett esophagus over 3 years of follow-up (20).