Controversies in NEN: An ENETS position statement on the management of locally advanced neuroendocrine neoplasia of the small intestine and pancreas without distant metastases

Abstract

Locally advanced neuroendocrine neoplasms (NENs) are defined by extensive local invasion in the absence of distant metastases, although specific definitions may vary among study groups. While most patients with NENs present with localized or metastatic disease, a smaller subset is diagnosed with locally advanced tumors. Management of this subgroup remains particularly challenging, owing to the limited evidence base and lack of consensus regarding optimal therapeutic strategies. This guidance document synthesizes the current evidence and expert knowledge on the management of locally advanced NENs of the small intestine and pancreas, addressing four clinically relevant key questions that aim to inform best practice in these patients.