Prognostic impact of tumour burden in stage IV neuroendocrine neoplasia: a comparison between pancreatic and gastrointestinal localizations
Background: Although prognosis of NENs is affected by several features including tumour burden, the specific role of this factor in pancreatic NENs (PanNENs) and gastrointestinal NENs (GI NENs) is not well established. Aim: To compare the prognostic role of tumour burden in PanNENs and GI NENs. Patients and methods: This study was a retrospective analysis of stage IV PanNENs and GI NENs. Tumours were classified based on liver tumour volume (<25% or >25%). Overall survival as assessed by Kaplan-Meier curves, and Cox proportional hazards method was used to perform risk factor analysis.