Clinical trial Recruiting at 2 sites Phase 2 Interventional Ages 18 and up

Hippocampal avoidance during craniospinal irradiation for breast and lung cancer with leptomeningeal metastases

Official title: A Multi-Center Phase 2 Study of Hippocampal Avoidance in Craniospinal Irradiation for Leptomeningeal Metastases From Solid Tumors

Run by University of Washington · NCT06518057 · Data updated 2026-11-12

This study is testing a new way of giving radiation therapy to help people with breast or lung cancer that has spread to their brain, aiming to reduce symptoms while protecting their memory.

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Quick facts

PhasePhase 2
Study typeInterventional
Ages18 Years and up
SexAll
Enrollment22 (estimated)
SponsorUniversity of Washington
Academic / other
Drugs / interventionsradiation
Locations3 sites (San Francisco, California and 2 other locations)
StatusRecruiting
StartedMarch 3, 2025
Main results expectedJuly 1, 2027
Study endsJuly 1, 2028
Registry record updatedAugust 14, 2026
Trial IDNCT06518057 on ClinicalTrials.gov

Is this trial a fit for you?

Likely a good fit

Ideal candidates include adults with breast cancer or non-small cell lung cancer who have confirmed leptomeningeal metastases and are eligible for radiation therapy.

Probably not a fit

Patients with other types of cancer or those who do not have leptomeningeal metastases 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 phase II clinical trial investigates the effectiveness of craniospinal irradiation (CSI) with hippocampal avoidance in patients suffering from leptomeningeal metastases due to breast cancer or non-small cell lung cancer. The study employs proton therapy or volumetric modulated arc therapy (VMAT) to target tumor cells while minimizing radiation exposure to the hippocampus, which is crucial for memory and cognitive function. Patients will receive treatment once daily for 10 days and will be monitored through various imaging techniques and follow-ups for up to a year. The goal is to relieve symptoms caused by the metastases while reducing neurological side effects associated with traditional radiation therapy.

Why it matters

Potential benefit: If successful, this approach could improve treatment outcomes and quality of life for patients with leptomeningeal metastases.

How similar studies have gone: While the approach of hippocampal avoidance in radiation therapy is gaining interest, this specific application in leptomeningeal metastases is relatively novel and has not been extensively tested in prior studies.

Who can join: the full rules

Show full inclusion / exclusion criteria
Inclusion Criteria:

* Patients with breast cancer or NSCLC malignancies with leptomeningeal metastases established radiographically and/or through CSF cytology
* Patients who are candidates for radiation therapy for the treatment of leptomeningeal metastases
* Patients ≥ 18 years old
* Karnofsky performance status (KPS) ≥ 60 or Eastern Cooperative Oncology Group (ECOG) ≥ 2
* The patient is able to provide informed consent
* Hemoglobin \> 8 g/dL
* Absolute neutrophil count \> 1,000/mm
* Platelet count \> 100,000/mm
* Participants born female at birth must either be of non-reproductive potential (i.e. post-menopausal by history \[≥ 60 years old, or with no menses for \> 1 year without an alternative medical cause\], OR history of hysterectomy, OR history of bilateral tubal ligation, OR history of bilateral oophorectomy) or must have a negative serum /urine pregnancy test within 3 weeks prior to starting radiation therapy (RT)
* Patients with reproductive potential must agree to practice two highly effective contraceptive methods

Exclusion Criteria:

* Patients with multiple, serious major neurologic deficits per physician/investigator assessment including encephalopathy
* Patients with extensive systemic disease and without reasonable systemic treatment options
* Patients who are unable to undergo MRI brain and spine with gadolinium contrast
* Previous radiotherapy to the intended treatment site that precludes developing a treatment plan that respects normal tissue tolerances
* Gross ventricular disease
* Brain metastases within 5 mm of the hippocampal contours not previously treated
* Pregnant or lactating women

Where it's running

  • Laura and Isaac Perlmutter Cancer Center at NYU Langone
    New York, New York, United States
    Recruiting
  • Fred Hutch/University of Washington Cancer Consortium
    Seattle, Washington, United States
    Recruiting
  • University of California San Francisco
    San Francisco, California, United States
    Not yet recruiting

Study contacts

  • Principal investigator: Lia M. Halasz — Fred Hutch/University of Washington Cancer Consortium
  • Study coordinator: Lia M. Halasz
  • Email: lhalasz@uw.edu
  • Phone: 206-897-2121

Similar studies

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

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.