This video demonstrates the use of microgrippers, a novel microbiopsy device invented at Johns Hopkins. The microgrippers are tether-free, allowing for simultaneous biopsying of tens or hundreds of locations within the gastrointestinal tract, such as the biliary tree, colon or esophagus. We envision that this technology will change the way we perform biopsies within the GI tract, for a variety of conditions, such as Ulcerative Colitis, Crohn's disease, eosinophilic esophagitis, Barrett's esophagus, atrophic gastritis, cholangiocarcinoma and others. For more information, visit http://www.hopkins-gi.org/JHH_Home.aspx