Clinical trial Recruiting at 1 site Phase2; Phase3 Interventional Ages 18 and up

Investigating the impact of somatostatin analogues on tumor dose during radionuclide therapy

Official title: Absorbed Tumor Dose in Peptide Receptor Radionuclide Therapy with Long-acting Somatostatin Analogues - ATSA Trial

Run by The Netherlands Cancer Institute · NCT06855095 · Data updated 2026-11-12

This study is testing if stopping or continuing long-acting somatostatin treatment affects how well radionuclide therapy works for adults with neuroendocrine tumors.

More Neuroendocrine Tumors trials

Quick facts

PhasePhase2; Phase3
Study typeInterventional
Ages18 Years and up
SexAll
Enrollment39 (estimated)
SponsorThe Netherlands Cancer Institute
Academic / other
Locations1 site (Amsterdam)
StatusRecruiting
StartedJune 25, 2024
Main results expectedJanuary 1, 2027
Study endsMarch 1, 2027
Registry record updatedMarch 3, 2025
Trial IDNCT06855095 on ClinicalTrials.gov

Is this trial a fit for you?

Likely a good fit

Ideal candidates include adults over 18 with histopathologically confirmed neuroendocrine tumors who have been treated with LA-SSA for at least three months.

Probably not a fit

Patients unable to discontinue LA-SSA for the required duration or those with short-acting SSA usage may not benefit from this study.

A plain-English reading of the study's rules. Only the study team can confirm whether you qualify.

What this trial studies

This clinical trial aims to evaluate how long-acting somatostatin analogues (LA-SSA) affect the absorbed dose in tumor lesions during peptide receptor radionuclide therapy (PRRT) for patients with neuroendocrine tumors. Patients aged over 18 with confirmed neuroendocrine tumors are randomized into two groups: one that discontinues LA-SSA prior to PRRT and another that continues LA-SSA treatment. The study will assess the effectiveness of these approaches in improving treatment outcomes. The trial is conducted in collaboration with the Neuroendocrine Tumor Research Foundation at the Netherlands Cancer Institute.

Why it matters

Potential benefit: If successful, this study could optimize treatment protocols for neuroendocrine tumors, potentially improving patient outcomes.

How similar studies have gone: Other studies have explored the effects of somatostatin analogues in similar contexts, but this specific approach is novel.

Who can join: the full rules

Show full inclusion / exclusion criteria
Inclusion Criteria:

* Age ≥ 18 years;
* Able to provide spoken and written informed consent for the trial;
* Histopathological confirmed neuroendocrine tumor;
* Fulfill the clinical criteria for PRRT;
* At least one soft tissue lesion \> 2 cm;
* Aimed administered activity of 7400 MBq;
* ECOG score (performance status) 0-2.

Exclusion Criteria:

* Not possible to discontinue LA-SSA for 4-6 weeks;
* Use of short-acting SSAs;
* Pregnancy and lactating female patients;
* Inability to comply to the study procedures;
* Factors that might affect the biodistribution (for example, indication for furosemide directly after PRRT infusion, limited fluid intake, any renal catheters, etc.).

Where it's running

  • Antoni van Leeuwenhoek
    Amsterdam, Netherlands
    Recruiting

Similar studies

Other studies for the same condition or treatment. Recruiting studies are listed first.

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  • Somatostatin analogues after PRRT for nonfunctional neuroendocrine tumors

    This study tests whether continuing somatostatin analogues after PRRT helps patients with nonfunctional neuroendocrine tumors compared with just observation.

    Recruiting Phase 3 Washington University School of Medicine · San Francisco, California and 1 other locations · NCT07842172

How to take part

  1. Review the eligibility criteria above with your treating physician.
  2. Check the official listing on ClinicalTrials.gov for the latest contact details and recruitment status.
  3. Contact the study coordinator or principal investigator to ask for pre-screening. Pre-screening is free and never obligates you to enroll.
Last reviewed 2026-11-14 by the Find a Trial editorial team. Information on this page is for educational purposes and is not medical advice. Always consult qualified healthcare professionals about clinical trial participation.