Malignant Small Bowel Neoplasms: A 20-Year Retrospective Analysis in a Tertiary Center

Given the rarity of these tumors, the cohort of malignant small bowel neoplasms collected at this tertiary center over a 20-year period represents a substantial sample. More than half of patients were symptomatic at diagnosis, despite diagnostic advances over the years. In the last 10 years of the study, there has been an increase in incidence as well as in 5-year survival rates, possibly due to the higher incidence of neuroendocrine tumors and the lower incidence of adenocarcinomas. Notably, the diagnosis of each histological neoplasm type differed significantly statistically over the years, with neuroendocrine tumors being the most diagnosed in recent years.