Microscopic imaging of the digestive tract moves beyond examination of tissue at subcellular levels, helping us identify molecular regions in which to probe for dysplasia. Dr. Thomas Wang, assistant professor of medicine and biomedical engineering at the University of Michigan Medical School, details this 'biopsy inside the body' with host Dr. Mark DeLegge. How could this technology shape the future of GI practice? How does this differ from chromoendoscopy, autofluorescence, and other current technologies?