LAUSR

A 64-year-old man with unresectable pancreatic cancer, who had previously undergone placement of a fully covered self-expandable metallic stent (FCSEMS) in the bile duct, experienced acute cholecystitis. Contrast-enhanced computed tomography revealed a markedly distended gallbladder with a severely irregular wall and intraluminal membranes indicating gangrenous cholecystitis (▶Fig. 1, ▶Video1) [1]. As percutaneous gallbladder aspiration without tube placement was ineffective, endoscopic ultrasoundguided transluminal gallbladder drainage (EUS-GBD) was performed (▶Fig. 2, ▶Video1). Following puncture with a 19-gauge needle and dilation with a 7-Fr bougie catheter, an FCSEMS (WallFlex, 10×60mm; Boston Scientific Japan K. K., Tokyo, Japan) was deployed at the puncture site, bridging the gallbladder and stomach. In addition, a 7-Fr double-pigtail plastic stent was placed across the FCSEMS as an anchor to prevent stent migration. Despite the successful unimpeded endoscopic procedure, generalized peritonitis with a notable amount of ascites and pneumoperitoneum occurred the following day (▶Fig. 3, ▶Video1). Emergency surgery revealed the presence of 2500mL of dark-colored ascites, with a dirty appearance, although the stents appropriately remained astride the gallbladder and stomach. Cholecystectomy and closure of the gastric hole where the stents had been placed were performed, resulting in a remarkable improvement in the patient’s condition. We speculatively concluded that bile and gastric fluid would continuously leak along the FCSEMS because the gangrenous gallbladder wall was too loose and fragile to sufficiently tighten the stent. Several studies [2, 3] have reported EUS-GBD as an alternative to percutaneous transhepatic gallbladder drainage (PTGBD) for acute cholecystitis, especially in cases with advanced malignancy. However, severe bile leakage may be more frequent following EUS-GBD than PTGBD procedures because of nonadhesion between the gallbladder and gastrointestinal tract, whereas the PTBGD route can involve an intervening liver, which adheres to the gallbladder wall. Gangrenous cholecystitis might be a risk factor for severe bile leakage in gallbladder drainage; therefore, PTGBD would be preferable to EUS-GBD in such patients.