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Recruiting

NCT Number: NCT06943755

Zanzalintinib Versus Everolimus in Participants With Locally Advanced or Metastatic Neuroendocrine Tumors

The primary purpose of this study is to assess the effectiveness of zanzalintinib compared to everolimus in participants with previously treated, unresectable, locally advanced or metastatic neuroendocrine tumors.

Recruiting

Interested in participating?

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Key information

Who can participate

Healthy volunteers accepted: No

Only the study team can determine whether someone qualifies for participation.

Key Inclusion Criteria:

  • Histologically confirmed, locally advanced/unresectable or metastatic, well-differentiated Grade 1, 2, or 3 NETs of pancreatic origin or extra-pancreatic origin.
  • Allowed prior lines of therapy, based on the site of NET and functional status.
  • Documented radiographic disease progression per RECIST 1.1, as assessed by the Investigator based on imaging assessments (computed tomography [CT] or magnetic resonance imaging [MRI]) within 12 months before randomization.
  • Measurable disease according to RECIST 1.1 as determined by the Investigator.
  • Archival tumor tissue is required, if available. If archival tumor tissue is not available, a fresh biopsy may be submitted if it can be safely and feasibly obtained. Every attempt should be made to provide tumor tissue.

Key Exclusion Criteria:

  • Histologically confirmed neuroendocrine carcinomas (including small cell lung cancer), medullary thyroid cancer, pheochromocytoma, paraganglioma, Merkel cell carcinoma, and mixed neuroendocrine non-neuroendocrine neoplasm (MiNEN).
  • Prior treatment with a vascular endothelial growth factor receptor (VEGFR) -targeting tyrosine kinase inhibitor or a mammalian target of rapamycin (mTOR) inhibitor.
  • Systemic chemotherapy and any liver-directed or other ablative therapy within 4 weeks before randomization.
  • Systemic radionuclide therapy within 6 weeks before randomization.
  • Radiation therapy for bone metastases within 2 weeks, any other radiation therapy, except as indicated above, within 4 weeks before randomization.

Note: Other protocol defined Inclusion/Exclusion criteria may apply.

Treatment and study plan

Zanzalintinib

Drug

Administered as specified in the treatment arm.

Other names: XL092

Everolimus

Drug

Administered as specified in the treatment arm.

Other names: Afinitor

Primary outcomes

  1. Progression-Free Survival (PFS) Per Response Evaluation Criteria in Solid Tumors Version (RECIST) 1.1 as Assessed by Blinded Independent Central Review (BICR)

    Time frame: Up to 48 months

Secondary outcomes

  1. PFS Per RECIST 1.1 as Assessed by Investigator

    Time frame: Up to 48 months

  2. Objective Response Rate (ORR) Per RECIST 1.1 as Assessed by BICR and Investigator

    Time frame: Up to 48 months

  3. Overall Survival (OS)

    Time frame: Up to 60 months

  4. Duration of Response (DOR) Per RECIST 1.1 as Assessed by BICR and Investigator

    Time frame: Up to 48 months

  5. Disease Control Rate (DCR) Per RECIST 1.1 as Assessed by BICR and Investigator

    Time frame: Up to 48 months

  6. Change From Baseline in Participant-Reported Global Health Status (GHS) and Disease-Related Symptoms as Assessed by European Organization for Research and Treatment of Cancer (EORTC) Quality of Life Questionnaire (QLQ-C30) Score

    Time frame: Up to 48 months

  7. Change From Baseline in Participant-Reported GHS and Disease-Related Symptoms as Assessed by EORTC Gastrointestinal Neuroendocrine Tumor module (QLQ-GI.NET21) Score

    Time frame: Up to 48 months

  8. Number of Participants With Adverse Events

    Time frame: Up to 48 months

Study contacts

Contact information is provided by the study sponsor or research team.

Backup or International

CONTACT

650-837-7400

Exelixis Clinical Trials

CONTACT

[email protected]

1-888-EXELIXIS (888-393-5494)

Sponsors and collaborators

Lead sponsor

Exelixis

Industry

Registry information

Official study title

A Phase 2/3, Multicenter, Randomized Open-Label Study of Zanzalintinib vs Everolimus in Participants With Previously Treated, Unresectable, Locally Advanced or Metastatic Neuroendocrine Tumors

Acronym: STELLAR-311

Important dates

Study start
2025
Primary completion
2029
Study completion
2029
First posted
Apr 24, 2025
Registry last updated
Jul 22, 2026

OpenTrials presents study information sourced from ClinicalTrials.gov. The official registry record should be consulted for the latest information.

View the official ClinicalTrials.gov record (opens in a new tab)

This listing is for discovery and informational purposes only. It is not medical advice, does not guarantee that a study is recruiting, and does not determine eligibility. Contact the study team and a qualified healthcare professional when considering participation.

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