Fig. 3From: Occult mucin-producing cholangiocarcinoma in situ: a rare clinical case with difficult tumour staging a. Duodenoscopy. The orifice of the Vater’s papilla was expanded by mucus. b. Endoscopic retrograde cholangiography. The entire bile duct was diffusely dilated. There was floating mucus in the left hepatic duct (pink arrow head)Back to article page