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New radiation boost shows promise for elderly glioblastoma patients

NCT ID NCT05565521

Disease control Sponsor: Sunnybrook Health Sciences Centre Source: ClinicalTrials.gov ↗

What the study statuses mean

This study's is highlighted.

Recruitment status, easiest to join first

Recruiting now
This trial is taking on new participants right now.
Not yet recruiting
Registered, but not yet taking participants.
By invitation only
Not open to general applications. Only people the study team invites can take part.
Paused
Paused for now. It may or may not start again.
Ongoing This study
Running, but no longer taking on new participants.
Completed
The trial has finished. Results may not be published yet.
Stopped early
Stopped early, before it reached the end. That can be for many reasons, including safety.
Cancelled
Cancelled before anyone took part.

Expanded access (not trials)

Expanded access
Not a trial. This treatment can be requested outside a study, case by case, for people who qualify.
Expanded access (paused)
Not a trial. The treatment can normally be requested outside a study, but is unavailable right now.
Expanded access (ended)
Not a trial. The treatment could once be requested outside a study, but no longer can.
Approved
The treatment has been approved, so it is available normally rather than through this programme.

When the status isn't known

Details not published
The full record has not been published yet, so there is little to show here.
Status unknown
This status has not been confirmed recently, so it may be out of date.

First seen Jun 27, 2026 · Last updated Jun 27, 2026

Summary

This phase 2 trial tests a higher radiation dose given over just 3 weeks for patients 65 and older with glioblastoma or grade 4 astrocytoma. Using a special MRI-guided machine (MR-Linac), doctors can adjust the radiation daily to target the tumor more precisely. The goal is to see if this approach improves how long patients live without their cancer growing, while keeping side effects manageable.

What this could mean

Our plain-language read of the trial. This is informational only, not medical advice or a prediction.

Active substance
Radiation therapy (dose escalation with reduced margins) plus temozolomide chemotherapy
What this could lead to
If successful, this could offer a more effective, shorter radiation regimen for elderly glioblastoma patients, potentially improving survival without increasing side effects.
What could go wrong
This is a small, early-phase trial with only 55 participants, so results may not apply broadly. The higher radiation dose could still cause brain swelling or other side effects, and survival benefits are not guaranteed.

This is an AI summary of the original study and may miss details. Read our disclaimer.

Study facts

What this study's own registry entry says, in plain language.

Phase

Phase 2

Tests whether the treatment actually works, and watches for side effects, in a larger group.

Participants

About 55 people

The number the study aims to enrol. It can still change while the study runs.

Started

Dec 2022

Expected to finish

Dec 2028

An estimate. End dates often move.

Lead sponsor

Other sponsor

The registry's catch-all category, for sponsors it does not file as a company, a government agency, or a research network.

Who can take part

This study's own entry requirements. Only the study team can say for certain whether you qualify.

Ages

65 years and older

Sex

Anyone

Healthy volunteers

Not accepted

This study is not open to healthy volunteers. The entry requirements below say who it is open to.

Show the full entry requirements

Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.

Inclusion Criteria: * Patient age ≥ 65 years * Histopathologically confirmed, based on biopsy or surgical resection, glioblastoma or WHO grade 4 astrocytoma, IDH-mutant * Biopsy or surgical resection performed ≤ 6 weeks prior to study entry * Deemed suitable by the treating physicians for 15 daily fractions of radiation, delivered daily over 3 weeks, with concurrent temozolomide chemotherapy * Expected survival ≥ 12 weeks * ECOG performance status of 0, 1 or 2 * Able (sufficiently fluent in English) and willing to complete QOL questionnaires; however, inability to complete the questionnaires will not make the patient ineligible for the study * Sufficient estimated glomerular filtration rate (eGFR) of ≥ 30 mL/min/1.73 m2 to allow administration of gadolinium-based contrast agent; patients with eGFR \< 30 mL/min/1.73 m2 not on dialysis may be allowed on the study after discussion of risks and benefits and approval by study neuroradiologist(s) * Completed written informed consent * Patient must be accessible for treatment and follow-up Exclusion Criteria: * Contraindications to MRI as per standard MRI screening policy * Contraindication to Gadolinium-based contrast media * Inability to lie flat in a supine position for at least 90 minutes * Inability to tolerate immobilization in a head thermoplastic mask * Patients \> 140 kg and/or a circumference \> 60 cm * Prior dose-limiting cranial irradiation * T1w post-gadolinium enhancing disease involving the brainstem * Leptomeningeal dissemination of disease * Patients with any condition (e.g. psychological, geographical, etc.) that does not permit compliance with the protocol

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Conditions

The condition(s) this trial relates to.

adult glioblastoma astrocytoma, IDH-mutant, grade 4 glioblastoma

As listed by the trial registrant

The condition terms exactly as the trial's registrant entered them.

Glioblastoma multiforme, adult Glioblastoma, IDH-mutant

Contacts and locations

Locations

  • Odette Cancer Centre, Sunnybrook Health Sciences Centre

    Toronto, Ontario, M4N 3M5, Canada

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