for people ages 18 years and up (full criteria)
study started
estimated completion
Principal Investigator
by Robert Flavell, MD, PhD (ucsf)
Photo of Robert Flavell
Robert Flavell



This pilot clinical trial studies how well Gallium-68 prostate specific membrane antigen positron emission tomography (PET) work in diagnosing patients with thyroid cancer. Diagnostic procedures, such as 68Ga-PSMA PET, may more accurately diagnose thyroid cancer and find out how far the disease has spread.

Official Title

Gallium-68 Prostate Specific Membrane Antigen (68Ga-PSMA) PET for Imaging of Thyroid Cancer: A Feasibility Study


PRIMARY OBJECTIVES: I. To determine the feasibility and utility of Gallium Ga 68-labeled PSMA-11 (68Ga-PSMA) PET imaging in patients with thyroid cancer. SECONDARY OBJECTIVES: I. To assess the correlation between targeted molecular uptake of 68Ga-PSMA PET in thyroid cancer compared to areas identified as tumor by radioiodine uptake (in well-differentiated cancers) or fludeoxyglucose F-18 (18F-FDG) uptake (in poorly differentiated and/or radioiodine-negative cancers). II. To determine and compare the sensitivity and specificity of 68Ga-PSMA PET to (18F-FDG) PET and/or radioiodine scintigraphy. TERTIARY OBJECTIVES: I. To determine if 68Ga-PSMA PET uptake is related to tumor differentiation and PSMA staining in tissue pathology when available. II. To determine the correlation between standardized uptake value maximum (SUVmax) of target thyroid cancer lesions on 68Ga-PSMA PET and serum thyroglobulin levels. OUTLINE: Participants receive 68Ga-PSMA intravenously (IV) over 1-2 minutes and then undergo PET/MRI 60 minutes after injection. Patients may undergo a second PET/MRI 2-6 months after completion of first scan.


Thyroid Gland Carcinoma Thyroid Neoplasms Thyroid Diseases Edetic Acid Gallium Ga 68-labeled PSMA-11 Magnetic Resonance Imaging Positron Emission Tomography (PET)


You can join if…

Open to people ages 18 years and up

  • History of thyroid cancer
  • Whole body 18F-FDG PET/computed tomography (CT) or I-131 scintigraphy within the past 90 days of the scheduled 68Ga-PSMA PET demonstrating uptake
  • Creatinine =< 3.0 mg/dL
  • Ability to understand a written informed consent document, and the willingness to sign it

You CAN'T join if...

  • Patients who have had active infection within 15 days of study enrollment that may be considered to interfere with 68Ga-PSMA PET imaging by the study investigators
  • Patients who are unable to have placement of intravenous line access
  • Pregnant or breastfeeding women
  • Patients not capable of undergoing a PET/MRI study due to weight, claustrophobia, or inability to lie still for the duration of the exam


  • University of California, San Francisco accepting new patients
    San Francisco California 94115 United States

Lead Scientist at UC Cancer

  • Robert Flavell, MD, PhD (ucsf)
    Robert Flavell, MD, PhD, is the Chief of Molecular Imaging and Therapeutics Clinical Section in the Department of Radiology and Biomedical Imaging at the University of California, San Francisco. He received his medical degree from Weill Cornell Medical College, and his PhD from the Rockefeller University as part of the Tri-Institutional MD PhD program.


accepting new patients
Start Date
Completion Date
University of California, San Francisco
Phase 2
Study Type
Last Updated