Clinical trial Recruiting at 1 site Interventional Ages 18 to 100

18F-FET PET imaging for pituitary adenomas

Official title: Exploring the Potential for 18F-fluoro-ethyl-tyrosine (18F-FET) to Enable Wider Access to Molecular Imaging for Patients With Pituitary Adenomas (FET-pit-PET Study)

Run by University of Cambridge · NCT06584123 · Data updated 2026-11-12

This pilot will test whether 18F-FET PET scans can detect pituitary adenomas as well as 11C-methionine PET scans in adults who previously had Met-PET.

Quick facts

Study typeInterventional
Ages18 Years to 100 Years
SexAll
Enrollment20 (estimated)
SponsorUniversity of Cambridge
Academic / other
Locations1 site (Cambridge, Cambridgeshire)
StatusRecruiting
StartedSeptember 3, 2024
Main results expectedSeptember 2, 2026
Study endsDecember 31, 2026
Registry record updatedJanuary 6, 2026
Trial IDNCT06584123 on ClinicalTrials.gov

Is this trial a fit for you?

Likely a good fit

Adults (age 18+) with a suspected pituitary adenoma who previously had an 11C-methionine PET and can give informed consent are ideal candidates.

Probably not a fit

Patients who are pregnant, cannot lie flat for the scan, exceed scanner size limits, have contraindications to intravenous contrast, or who have not had prior Met-PET are unlikely to benefit from participation.

A plain-English reading of the study's rules. Only the study team can confirm whether you qualify.

What this trial studies

This single-centre pilot will enroll up to 20 adults with newly diagnosed or residual/recurrent pituitary adenomas who previously underwent 11C-methionine PET as part of routine care. Enrolled participants will receive an 18F-fluoroethyl-tyrosine (FET) PET scan at Cambridge University Hospitals. Quantitative and qualitative image analyses will compare lesion localization and uptake patterns between prior Met-PET and the new FET-PET scans. The study aims to determine whether FET-PET provides comparable imaging information to Met-PET for surgical or radiotherapy planning.

Why it matters

Potential benefit: If FET-PET performs comparably to Met-PET, it could provide a more accessible, longer‑lived tracer option to better localize pituitary tumors and support treatment planning.

How similar studies have gone: 11C-methionine PET is an established method for pituitary tumor localization, while 18F-FET PET has shown promise in brain tumor imaging but is less tested specifically for pituitary adenomas.

Who can join: the full rules

Show full inclusion / exclusion criteria
Inclusion criteria

* Participant is willing and able to give informed consent for participation in the study
* Male or female, age 18 or above
* Presence of pituitary adenoma suspected on the basis of clinical/biochemical and/or radiological findings
* Previous 11C-Met-PET/CT

Exclusion criteria

* Inability to give informed consent
* Pregnancy or suspected pregnancy
* Inability to lie supine for 30-60 minutes
* Patient body habitus above scanner dimensions
* Known allergy to intravenous radiographic contrast agents

Where it's running

  • Cambridge University Hospitals
    Cambridge, Cambridgeshire, United Kingdom
    Recruiting

Study contacts

  • Principal investigator: Mark Gurnell, MD, PhD — Cambridge University Hospitals NHS Foundation Trust
  • Study coordinator: James MacFarlane
  • Email: jm2267@medschl.cam.ac.uk
  • Phone: 01223 250882

Similar studies

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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.