PROGNOSTIC FACTORS FOR SURVIVAL OF MEN1 PATIENTS WITH DUODENOPANCREATIC TUMORS METASTATIC TO THE LIVER: RESULTS FROM THE DMSG

ABSTRACT Objective: Duodenopancreatic neuroendocrine tumors (DP-NETs) develop in a majority of patients with multiple endocrine neoplasia type 1 (MEN1) and are the leading cause of death. Overall survival (OS) and prognostic factors for patients with liver metastases from DP-NETs are not known. Methods: This was a cohort study using the Dutch National MEN1 database, which includes >90% of the Dutch MEN1 population treated between 1990 and 2014. OS was assessed with time to event analysis, and prognostic factors were evaluated. Results: A total of 56% of the MEN1 patients (n = 220) were diagnosed with a DP-NET, of who 34 (15%) developed DP-NET liver metastases. Median age at liver metastases diagnosis was 53 years (range 31–74). Of those patients, 16 patients (47%) had died after a median follow-up of 4 years (range 0.3–12.3). OS at 2, 5, and 10 years were 91%, 65%, and 50%, respectively. A trend towards worse survival was seen in males compared to females (5-year OS 58% versus 75%, P = .07) and also in pa...