Epidemiology of Neuroendocrine Neoplasms in the US

Neuroendocrine neoplasms (NENs) are increasing in incidence; prevalence and at the same time, practice patterns have also evolved, impacting classification and survival of these malignant neoplasms. However, updated epidemiological data are lacking.

To define the epidemiological and survival trends of patients with NENs in the US. Design, Setting, and Participants: This cross-sectional study used data from the National Cancer Institute's Surveillance, Epidemiology, and End Results (SEER) program on NEN cases from 1975 to 2021. Analysis of project data was conducted between August 2023 and August 2024. Main Outcomes and Measures: Annual age-adjusted incidence between 1975 and 2021, limited duration prevalence, and overall survival (OS) rates. Recent trends in survival were evaluated from 2000 to 2021 for the entire cohort as well as specific subgroups including distant stage gastrointestinal neuroendocrine tumors (NETs) and pancreatic NETs.