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Tiny implant could replace spinal taps for brain tumor monitoring

NCT ID NCT06322602

Knowledge-focused Sponsor: Mayo Clinic Source: ClinicalTrials.gov ↗

What the study statuses mean

This study's is highlighted.

Recruitment status, easiest to join first

Recruiting now This study
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
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 Results may not be published yet.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This status has not been confirmed recently, so it may be out of date.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 24, 2026 · Last updated Aug 06, 2026 · Updated 6 times

Summary

This study looks at whether placing a small device called an Ommaya reservoir under the scalp during a brain tumor biopsy allows doctors to safely collect fluid samples from the brain over time. Researchers want to see if this method works better than repeated spinal taps for tracking tumor growth. The trial involves 20 people with brain tumors and focuses on feasibility and safety.

What this could mean

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

What this could lead to
If successful, this approach could make it easier to monitor brain tumors over time using fluid samples instead of repeated spinal taps.
What could go wrong
This is a very small, early feasibility study with only 20 participants. It does not test any treatment, so it may not lead to direct patient benefits.

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

Not a phased trial

Phase numbers describe drug development. The registry uses this when they do not apply, as it does for trials of devices, procedures or behaviour changes, and for observational studies.

Participants

About 30 people

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

Started

Feb 2024

Expected to finish

Mar 2029

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

18 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: * Clinical and radiographic evidence suggesting a diagnosis of a brain tumor * Planned biopsy for suspected or previously diagnosed brain tumor as part of routine clinical care at Mayo Clinic (Rochester, Minnesota \[MN\]) * Willingness of the patient to provide informed consent * Patient is willing to have their Ommaya sampled on at least 2 future occasions * Patients is willing to have CSF banked through the neuro-oncology biorepository (requires a separate signature) Exclusion Criteria: * Vulnerable populations including pregnant women, prisoners, and individuals \< 18 years old * Patients who are not appropriate candidates for biopsy due to current or past medical history or uncontrolled current illness * Prior history of any wound infection * Any patient who the surgeon feels is not an optimal candidate for Ommaya reservoir placement. Such reasons may include, but will not be limited to, surgical anatomy, clinical evidence of immunosuppression, and/or elevated risk of wound infection due to diabetes, smoking history, morbid obesity, or any other concerns

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Conditions

The condition(s) this trial relates to.

brain cancer brain neoplasm

As listed by the trial registrant

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

Brain neoplasms

How to take part

Only the study team decides who joins. These are the ways to reach them.

  1. The study's own enquiry address

    This study publishes an address for enquiries. See it below .

  2. The places running it

    1 site. The list below names each one and where it is.

  3. The official record

    ClinicalTrials.gov lists the study team's own contact details, including names and phone numbers. We don't republish those.

    Open the record ↗

  4. A doctor treating you

    A doctor who knows your case can contact a study site on your behalf, and can tell you whether this study is worth pursuing at all.

Contacts and locations

Locations

  • Mayo Clinic in Rochester

    RECRUITING

    Rochester, Minnesota, 55905, United States

    Contact Email: •••••@•••••

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