Does a high serum vitamin D level offer protection from colorectal cancer--or might it actually increase risk? This prospective study of male smokers yields surprising results. American Journal of Epidemiology
The authors trace the origins and development of endoscopic technology, from "resectoscope" to modern devices for virtual and capsule endoscopy. Nature Reviews Urology
Although adverse events after outpatient colonoscopy in the elderly are generally rare, the risk rises with age, comorbidities, and performance of polypectomy, according to an NIH report. Reuters Health Information
