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New PET scan could spot tiny brain tumors missed by MRI

NCT ID NCT07463625

Diagnosis Sponsor: Hospices Civils de Lyon 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 Results may not be published yet.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This status has not been confirmed recently, so it may be out of date.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 27, 2026 · Last updated Jun 27, 2026

Summary

This study is testing whether a special PET scan using [18F]FET can better locate small pituitary tumors that cause Cushing's disease. Standard MRI misses these tumors in up to 30% of cases. Researchers will compare PET results with MRI and surgical findings in 20 adults to see if the new scan improves tumor detection and surgical planning.

What this could mean

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

Active substance
[18F]fluoroethyl-L-tyrosine (FET) PET imaging
What this could lead to
If successful, this imaging method could help doctors locate hard-to-find pituitary tumors more accurately, guiding surgery and reducing the need for invasive diagnostic procedures.
What could go wrong
This is a small, early-stage observational study with only 20 participants. The PET scan may not prove more accurate than current MRI, and results may not apply to all patients.

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.

Participants

About 20 people

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

Started

Nov 2023

Expected to finish

Nov 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.

Who is studied

Adults treated at a tertiary academic hospital with biochemically confirmed Cushing's disease, evaluated by pituitary MRI and \[18F\]FET PET as part of diagnostic work-up, and discussed for surgery.

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: * Adults (≥18 years). * Biochemical diagnosis of Cushing's disease as part of initial management. * Pituitary MRI performed; if visible, microadenoma \<10 mm in diameter. * Indication for discussion in multidisciplinary tumor board for surgical management. Exclusion Criteria: * Minor (age \<18 years). * Macroadenoma of the pituitary. * ACTH-dependent hypercortisolism secondary to ectopic secretion.

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Conditions

The condition(s) this trial relates to.

ACTH-dependent Cushing syndrome ACTH-producing pituitary gland neoplasm Cushing disease due to pituitary adenoma pituitary gland disorder

As listed by the trial registrant

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

ACTH-producing pituitary tumour Cushing disease

How to take part

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

  1. The places running it

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

  2. 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 ↗

  3. 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

  • Hôpital Louis Pradel - Service de Médecine Nucléaire

    RECRUITING

    Bron, 69500, France

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