Fig. 1. The procedure of conversion from percutaneous transhepatic gallbladder drainage (PTGBD). The gallbladder was collapsed by PTGBD (A) and filled by injection of normal saline (B). (C) The guidewire was coiled inside the gallbladder. (D) After a fistula was created between the luminal wall of the stomach or duodenum and the gallbladder with a 6-Fr cauterizing cystotome, a double pigtail stent was inserted.
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