Overtubes: a bridge to successful colonoscopic resection?

Endoscopic resection of colorectal polyps is the established method for the removal of most benign early colorectal neoplasia and even some early superficially invasive cancers. Despite the significant advances in new techniques to facilitate endoscopic mucosal resection (EMR) and endoscopic submucosal dissection (ESD), access to the lesion, particularly in the proximal colon, is sometimes difficult, often resulting in an unstable scope position with poor distal tip control.