Although gastroenteropancreatic neuroendocrine tumors, or GEP-NETs, are relatively common, they are often indolent. However, GEP-NETs can metastasize in a small portion of the population, so physicians should be aware of symptoms and screening tools. The two most common types of GEP-NETs are categorized as carcinoids and pancreatic endocrine tumors. What distinguishes the two? Host Dr. Lee Freedman welcomes Dr. David Metz, professor of medicine and associate chief for clinical affairs in the division of gastroenterology at Penn Medicine, to discuss characteristics and diagnosis of GEP-NETs.