As with other cancers, dysplasia is an important epidemiologic endpoint as the immediate precursor to cancer since the vast majority of gallbladder cancers develop through a histologic continuum of chronic cholecystitis, pseudopyloric metaplasia, incomplete intestinal metaplasia, dysplasia, and cancer. Thus, our aim is to identify risk factors for gallbladder dysplasia and cancer (GDC) and Version January 13, 2016 Koshiol Proposal - 2 potential non-invasive risk stratification methods, such as ultrasound characteristics alone or in combination with inflammatory markers and patient characteristics, to better understand the etiology and natural history of GDC and to help inform strategies for GDC prevention.