Increased selective biliary cannulation rates in the setting of periampullary diverticula: main pancreatic duct stent placement followed by pre-cut biliary sphincterotomy.

BACKGROUND

Selective biliary cannulation is often difficult when there is a periampullary diverticulum, especially when the papilla is within the diverticulum. We report eight such cases in which a new technique was used to achieve biliary access.

METHODS

Among 4138 ERCPs, there were 246 cases (5.9%) with periampullary diverticula. Biliary cannulation initially failed in eight patients (3.3%), five of whom had previously undergone six failed attempts at other institutions. A technique was used whereby the papilla was kept out of the diverticulum by placement of a pancreatic duct stent. Needle-knife sphincterotomy was then performed followed by attempts to achieve biliary access.

RESULTS

Biliary entry was immediately successful in five patients and successful at a second ERCP in two (overall success 87.5%). Two patients developed post-ERCP pancreatitis.

CONCLUSIONS

When the papilla is within the periampullary diverticulum, placement of a main pancreatic duct stent keeps the papilla out of the diverticulum, thereby facilitating pre-cut needle-knife sphincterotomy and selective biliary cannulation.