<p><b>INTRODUCTION: </b>Gastroenteropancreatic neuroendocrine tumors (GEP-NETs) are rare tumors. We report data of 407 GEP-NET cases from a neuroendocrine tumor (NET) registry in India.</p><p><b>METHODS: </b>The AP-NET registry is an open-label, multicenter, longitudinal observational registry of patients with GEP-NETs in which six tertiary care oncology centers contributed data. Data was prospectively entered in a dedicated computerized database and was reviewed retrospectively. The patients were divided into three cohorts-those diagnosed from 2001 to 2005, from 2006 to 2010, and from 2011 to 2016.</p><p><b>RESULTS: </b>Of the 407 cases registered, 37 were in Cohort I, 136 in Cohort II, and 234 in Cohort III. Majority were symptomatic with only 98 patients (24.0%) asymptomatic. The most common presentation of non-functional tumors was abdominal pain (42.4%), while functional tumors presented most commonly with carcinoid syndrome. Use of DOTA-PET, introduced in 2011, has increased evaluation in 33.3% patients in Cohort III. The most common primary site was pancreas in all three cohorts. Male preponderance (58.3%) was seen. Histopathological grading was obtained in 230 (56.5%) patients-118 (29%) Grade I, 74 (18.2%) Grade II, and 36 (8.8%) Grade III NET.</p><p><b>CONCLUSION: </b>This report highlights changing trends in the diagnosis and reporting of NETs over the last 15 years.</p>
J. Palepu, Shrikhande, S. V., Bhaduri, D., Shah, R. C., Sirohi, B., Chhabra, V., Dhar, P., Sastry, R., and Sikora, S., “Trends in diagnosis of gastroenteropancreatic neuroendocrine tumors (GEP-NETs) in India: A report of multicenter data from a web-based registry.”, Indian J Gastroenterol, vol. 36, no. 6, pp. 445-451, 2017.