Skip to Content
Authors Martin RC, Kooby DA, Weber SM, Merchant NB, Parikh AA, Cho CS, Ahmad SA, Kim HJ, Hawkins W, Scoggins CR
Author Profile(s)
Journal J. Gastrointest. Surg. Volume: 15 Issue: 1 Pages: 175-83
Publish Date 2011 Jan
PubMed ID 21103949

Currently, no reasonable staging system exists for pancreatic neuroendocrine tumors (PNET) to guide treating physicians. The aim of this study was to devise a staging system of relevant prognostic factors to better predict overall survival in PNET.A prospective 300 patient cohort and a review of the Surveillance Epidemiology and End Results database identified 6,447 patients with PNET from 1973 to 2008. Significant prognostic factors were created for an initial. Tumor: T (T1: ≤3 cm and localized to pancreas, T2: >3 cm and localized to the pancreas; T3: extension to adjacent organs and vessels), grade: G (G1: well/moderate and G2: poor/undifferentiated), and metastasis: M (M0: no distant mets, M1: distant mets) staging system.Significant predictors of survival on multivariate analysis included age, size, grade, and metastasis. Based on the TGM staging system: stage 1 (T1-2, G1, M0), stage 2 (T1-2, G2, M0), stage 3 (T3G2M0, Tany, G1, M1), stage 4: (Tany, G2, M1) was created with survival being statistically different between stages (p < 0.0001). Median survival rates were stage 1, 55 months; stage 2, 50 months; stage 3, 46 months; and stage 4, 25 months.Incorporation of this newly developed staging system into clinical practice will improve the ability to predict prognosis and aid in stratification of patients for clinical trials. Copyright © 2016 The Board of Regents of the University of Wisconsin System