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Can a radioactive tracer light up hidden tumors on scans?

NCT ID NCT06725693

Diagnosis Sponsor: Tianjin Medical University 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 Results may not be published yet.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This status has not been confirmed recently, so it may be out of date.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 Sep 08, 2026 · Last updated Sep 09, 2026 · Updated 1 time

Summary

This trial tests whether a single injection of a radioactive tracer called 68Ga/18F-Exendin 4 can improve PET/CT scans for finding tumors that carry GLP-1 receptors. Researchers will enroll 500 adults with suspected or known tumors, including insulinomas, and measure how brightly the tracer shows up in each lesion. The goal is to see if this imaging approach can accurately detect primary tumors and metastases, which could help guide diagnosis and treatment.

What this could mean

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

Active substance
A radioactive tracer called 68Ga/18F-Exendin 4, given as a single injection before PET/CT imaging
What this could lead to
If it works, this imaging method could help doctors find and map GLP-1 receptor-related tumors more accurately, guiding better treatment decisions.
What could go wrong
The tracer may not reliably distinguish all tumor types, and its diagnostic accuracy compared with standard imaging remains unproven until results are analyzed.

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 500 people

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

Started

Feb 2019

Expected to finish

Nov 2027

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

(i) adult patients (aged 18 years or order); (ii) patients with suspected or new diagnosed or previously treated malignant tumors (supporting evidence may include MRI, CT, tumor markers and pathology report); (iii) patients who had scheduled Exendin 4 PET/CT scan; (iv) patients who were able to provide informed consent (signed by participant, parent or legal representative) and assent according to the guidelines of the Clinical Research Ethics Committee.

Ages

18 to 80 years

Sex

Anyone

Healthy volunteers

Accepted

You do not need to have the condition being studied to take part.

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: \- (i) adult patients (aged 18 years or order); (ii) patients with suspected or new diagnosed or previously treated malignant tumors (supporting evidence may include MRI, CT, tumor markers and pathology report); (iii) patients who had scheduled Exendin 4 PET/CT scan; (iv) patients who were able to provide informed consent (signed by participant, parent or legal representative) and assent according to the guidelines of the Clinical Research Ethics Committee. Exclusion Criteria: \- (i) patients with non-malignant lesions; (ii) patients with pregnancy; (iii) the inability or unwillingness of the research participant, parent or legal representative to provide written informed consent.

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Conditions

The condition(s) this trial relates to.

neoplasm pancreatic insulinoma

As listed by the trial registrant

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

GLP1-R-related disease Insulinoma Positron emission tomography Tumor

How to take part

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

  1. The places running it

    3 sites. 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

  • The Affiliated Hospital of Qingdao University

    RECRUITING

    Qingdao, Shandong, 266000, China

  • The First Affiliated Hospital of University of Science and Technology of China

    RECRUITING

    Hefei, Anhui, 230000, China

  • Tianjin Medical University General Hospital

    RECRUITING

    Tianjin, Tianjin Municipality, 300052, China

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