[Development of colorectal advanced neoplasia/adenomas in the long-term follow-up of patients submitted to colonoscopy with polipectomy].

Context: Colonoscopy with polypectomy reduces the incidence of colorectal cancer and its associated mortality. The ideal interval between surveillance examinations is determined by clinical features and endoscopic findings considered as risk factors to the development of advanced colonic neoplasias.

Objective: To determine the development rate of advanced neoplasia in patients submitted to surveillance colonoscopy in a tertiary referral center.

Endoscopic laser lithotripsy for complicated bile duct stones: is cholangioscopic guidance necessary?

Background: Endoscopic papillotomy is successful in more than 95% of the cases of choledocholithiasis. For patients with difficult bile duct stones not responding to mechanical lithotripsy, different methods for stone fragmentation have been developed.

Aim: To compare the results of laser lithotripsy with a stone-tissue recognizing system, when guided by fluoroscopy only or by cholangioscopy.