Abstract
A 57-year-old man was admitted to our hospital for close precise examination because of the detection of a polyp of the gallbladder while treated at the hospital for liver cirrhosis. On abdominal US, a tumor with low echoes, measuring 20 mm in diameter, was detected at the fundus of the gallbladder. On EUS, this lesion had parenchymatous inner echoes with nodular surface. ERC and endoscopic double contrast cholecystography demonstrated polipoid lesion with papiilo-granular surface. We attempted to observe the lesion with a peroral choledochoscope following endoscopic papillary dilation by a balloon catheter, without EST. On observation with PCCS, the lesion within the gallbladder appeared as a papillary protuberance, surrounded by granural mucosa. We performed biopsy under direct vision, and could definitely diagnose the lesion as a carcinoma of the gallbladder. The inside of the gallbladder could be definitely diagnosed histologically by biopsy performed under direct vision, suggesting the usefulness of PCCS.
