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Endoscopic management of malignant biliary stricture after hepaticojejunostomy is challenging. Although balloon enteroscopy-assisted endoscopic retrograde cholangiopancreatography (ERCP) has been developed, dedicated devices are still insufficient. We present a case of successful enteroscopic dilation using a wire-guided diathermic dilator [1–5], and placement of a novel, ultra-slim, uncovered, self-expandable, metallic stent (USEMS) for the treatment of a severe malignant stricture of the perihilar bile duct after hepaticojejunostomy. A 52-year-old man with obstructive jaundice was referred to our department. He had undergone pancreaticoduodenectomy with hepaticojejunostomy for pancreatic head cancer 27 months earlier. He had received 6 months of chemotherapy for multiple liver metastases, but this treatment was suspended because of multiple liver abscesses, which developed 1 month before we saw him. Computed tomography revealed intrahepatic bile duct dilation, perihilar biliary mass, and ascites. Double-balloon enteroscopy (EI-530B; Fujifilm Corp., Tokyo, Japan) was selected for biliary drainage. Double-balloon enteroscopy showed jejunal invasion of recurrent tumor involving the hepaticojejunal anastomosis (▶Fig. 1 a, b). A tapered ERCP catheter and a 0.025-inch guidewire were passed through the stricture of the hepaticojejunal anastomosis (▶Fig. 1 b). ERCP showed perihilar biliary stricture (▶Fig. 2 a, ▶Video1), which could not be passed by the tapered ERCP catheter (▶Video1). The severe stricture was dilated successfully with a wire-guided diathermic dilator (Cysto-Gastro-Set, 6 Fr, length 180 cm; Endo-Flex, Voerde, Germany) (▶Fig. 2b, ▶Video1). Total dilation time was 3 seconds for the hepaticojejunal anastomosis and 13 seconds for the perihilar biliary stricture, respectively. A slim USEMS (Zilver 635, 6.0 Fr delivery system, 10mm diameter, 200 cm long; Cook Japan, Tokyo, Japan) failed to pass the stricture. However, a novel ultra-slim USEMS (BileRush Selective, 5.7 Fr delivery system, 10mm diameter, 185 cm long; Piolax Medical Devices, Kanagawa, Japan) was successfully deployed, followed by placement of an additional USEMS, in a stent-in-stent fashion, without any complications (▶Fig. 3, ▶Fig. 4, ▶Video1). In summary, using balloon enteroscopy, a wire-guided diathermic dilator and novel ultra-slim USEMS were useful in facilitating dilation and stenting for the treatment of severe malignant anastomotic and biliary strictures in a patient with altered anatomy.

Balloon enteroscopy-assisted biliary drainage using a diathermic dilator followed by placement of a novel ultra-slim metallic stent