Resection of the Primary Tumor vs. Systemic Treatment Alone for Patients With Small Intestinal Neuroendocrine Tumors and Unresectable Metastases: a Europe-wide Study

Brief summary (registry, in English)

When possible, surgery to completely remove small intestinal neuroendocrine tumors (siNETs) is always recommended. However, in cases where the tumor has spread and cannot be cured completely, it is unclear whether a surgical removal of the primary tumor only is reasonable. In this situation, current guidelines from the European Neuroendocrine Tumor Society (ENETS) recommend surgery only for patients who have symptoms like intestinal blockage or bleeding, or are at risk of such complications. For patients without symptoms, it is still unclear whether removing the main tumor improves overall outcomes and prevents future problems. Studies evaluating this type of surgery on survival show conflicting results. These studies often do not separate patients with symptoms from those without, and they overlook other important factors like the amount of cancer in the liver and nearby tissues. Due to these uncertainties, the rarity of siNETs and many factors that can affect outcomes, like age, overall health, or other current treatments, conducting a high-quality study to answer this question is challenging. To address this, the present Europe-wide study is being planned. This study aims to determine if resecting the main tumor improves the 10-year overall survival and reduces risks like intestinal blockages or blood flow issues compared to no surgery in patients without symptoms. The study will also assess other outcomes, such as how long patients stay free from disease progression, the risks of surgery, and prognostic factors for long-term survival. This international collaboration among neuroendocrine tumor referral centers will provide robust evidence to guide clinical practice and update treatment guidelines for siNETs.

What you commit to

• Study type: Observational
• Planned participants: 3200
• From 9 Mar 2026 to the primary completion date, 9 Mar 2026
• 1 site in 1 country
• Visits and tests: ask the trial team, the registry does not list them

Built from the registry fields of ClinicalTrials.gov. It describes the study, not your situation.

Who cannot take part

Copied verbatim from ClinicalTrials.gov and grouped by topic. Only the trial team decides who can take part.

Who the study is looking for

Sex: All · Does not accept healthy volunteers

Full criteria on ClinicalTrials.gov

Sites (1)

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