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Gallium-68 Prostate Specific Membrane Antigen PET in Diagnosing Patients With Thyroid Cancer

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

Status
Terminated
Phases
Phase 2
Study type
Interventional
Source
ClinicalTrials.gov
Registry ID
NCT03463889
Enrollment
12
Registered
2018-03-13
Start date
2018-03-19
Completion date
2020-10-31
Last updated
2021-06-29

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Thyroid Gland Carcinoma

Brief summary

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.

Detailed description

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.

Interventions

PROCEDUREMagnetic Resonance Imaging

Undergo MRI in combination with PET

PROCEDUREPositron Emission Tomography (PET)

Undergo PET in combination with MRI

Sponsors

University of California, San Francisco
Lead SponsorOTHER

Study design

Allocation
NA
Intervention model
SINGLE_GROUP
Primary purpose
DIAGNOSTIC
Masking
NONE

Eligibility

Sex/Gender
ALL
Age
18 Years to No maximum
Healthy volunteers
No

Inclusion criteria

* 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

Exclusion criteria

* 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

Design outcomes

Primary

MeasureTime frameDescription
Number of 68Ga PSMA-11 PET-positive LesionsUp to 24 monthsThe number of 68Ga PSMA-11 PET-positive lesions detected by staging scans will be descriptively reported.
Number of Overall Detected Thyroid Cancer LesionsUp to 24 monthsThe number of overall thyroid cancer lesions detected by standard staging scans will be descriptively reported
Mean Standardized Uptake Value Maximum of Gallium-68 PSMA (SUVmax)Up to 6 monthsThe mean and standard deviation for SUVmax across all lesions across all patients will be reported.

Secondary

MeasureTime frameDescription
Sensitivity of Gallium-68 PSMA for the Detection of Thyroid CancersUp to 24 monthsFor each lesion detected on 18F-FDG PET or radioiodine scintigraphy (131I), the presence or absence of 68Ga-PSMA-11 uptake will be reviewed and tabulated. Presence on either 131I and 18F-FDG will be considered true positive disease. If additional lesions are detected on 68Ga-PSMA-11 as compared to 18F-FDG or 131I, the lesions will be characterized as either true or false positives in comparison to the appearance of the lesion on conventional imaging (thyroid ultrasound, CT and MRI). The gold standard for an individual lesion will be FDG or 131I, if the individual lesion is positive on either imaging study. If the lesions are not seen on either FDG or 131I, then consensus reading of conventional imaging will be performed to determine true and false positives lesions. Point estimate of the true positive rate will be calculated.
Specificity of Gallium-68 PSMA for the Detection of Thyroid CancersUp to 24 monthsSpecificity is the agents ability to exclude the disease when the disease is absent. For each lesion detected on 18F-FDG PET or radioiodine scintigraphy (131I), the presence or absence of 68Ga-PSMA-11 uptake will be reviewed and tabulated. Presence on either 131I and 18F-FDG will be considered true positive disease. If additional lesions are detected on 68Ga-PSMA-11 as compared to 18F-FDG or 131I, the lesions will be characterized as either true or false positives in comparison to the appearance of the lesion on conventional imaging (thyroid ultrasound, CT and MRI). The gold standard for an individual lesion will be FDG or 131I, if the individual lesion is positive on either imaging study. If the lesions are not seen on either FDG or 131I, then consensus reading of conventional imaging will be performed to determine true and false positives lesions. Point estimate of the true negative rate will be reported.

Countries

United States

Participant flow

Participants by arm

ArmCount
Diagnostic (Gallium Ga 68-labeled PSMA-11, PET/MRI)
Participants receive 68Ga-PSMA 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. Gallium Ga 68-labeled PSMA-11: Given IV Magnetic Resonance Imaging: Undergo MRI in combination with PET Positron Emission Tomography (PET): Undergo PET in combination with MRI
12
Total12

Baseline characteristics

CharacteristicDiagnostic (Gallium Ga 68-labeled PSMA-11, PET/MRI)
Age, Customized
40-49 years old
2 Participants
Age, Customized
50-59 years old
2 Participants
Age, Customized
60-69 years old
4 Participants
Age, Customized
70-79 years old
3 Participants
Age, Customized
80-89 years old
1 Participants
Ethnicity (NIH/OMB)
Hispanic or Latino
3 Participants
Ethnicity (NIH/OMB)
Not Hispanic or Latino
9 Participants
Ethnicity (NIH/OMB)
Unknown or Not Reported
0 Participants
Race (NIH/OMB)
American Indian or Alaska Native
0 Participants
Race (NIH/OMB)
Asian
4 Participants
Race (NIH/OMB)
Black or African American
1 Participants
Race (NIH/OMB)
More than one race
0 Participants
Race (NIH/OMB)
Native Hawaiian or Other Pacific Islander
0 Participants
Race (NIH/OMB)
Unknown or Not Reported
1 Participants
Race (NIH/OMB)
White
6 Participants
Region of Enrollment
United States
12 participants
Sex: Female, Male
Female
7 Participants
Sex: Female, Male
Male
5 Participants
Years from initial diagnosis to study imaging3 years

Adverse events

Event typeEG000
affected / at risk
deaths
Total, all-cause mortality
0 / 12
other
Total, other adverse events
0 / 12
serious
Total, serious adverse events
0 / 12

Outcome results

Primary

Mean Standardized Uptake Value Maximum of Gallium-68 PSMA (SUVmax)

The mean and standard deviation for SUVmax across all lesions across all patients will be reported.

Time frame: Up to 6 months

Population: One patient with qualifying FDG PET/CT underwent surgical procedures prior to undergoing \[68Ga\]Ga-PSMA-11 PET/MRI and was therefore excluded from the analysis due to lack of comparability

ArmMeasureValue (MEAN)Dispersion
Diagnostic (Gallium Ga 68-labeled PSMA-11, PET/MRI)Mean Standardized Uptake Value Maximum of Gallium-68 PSMA (SUVmax)8.5 RatioStandard Deviation 5.7
Primary

Number of 68Ga PSMA-11 PET-positive Lesions

The number of 68Ga PSMA-11 PET-positive lesions detected by staging scans will be descriptively reported.

Time frame: Up to 24 months

Population: One patient with qualifying FDG PET/CT underwent surgical procedures prior to undergoing \[68Ga\]Ga-PSMA-11 PET/MRI and was therefore excluded from the analysis due to lack of comparability

ArmMeasureValue (NUMBER)
Diagnostic (Gallium Ga 68-labeled PSMA-11, PET/MRI)Number of 68Ga PSMA-11 PET-positive Lesions28 lesions
Primary

Number of Overall Detected Thyroid Cancer Lesions

The number of overall thyroid cancer lesions detected by standard staging scans will be descriptively reported

Time frame: Up to 24 months

Population: One patient with qualifying FDG PET/CT underwent surgical procedures prior to undergoing \[68Ga\]Ga-PSMA-11 PET/MRI and was therefore excluded from the analysis due to lack of comparability

ArmMeasureValue (NUMBER)
Diagnostic (Gallium Ga 68-labeled PSMA-11, PET/MRI)Number of Overall Detected Thyroid Cancer Lesions43 lesions
Secondary

Sensitivity of Gallium-68 PSMA for the Detection of Thyroid Cancers

For each lesion detected on 18F-FDG PET or radioiodine scintigraphy (131I), the presence or absence of 68Ga-PSMA-11 uptake will be reviewed and tabulated. Presence on either 131I and 18F-FDG will be considered true positive disease. If additional lesions are detected on 68Ga-PSMA-11 as compared to 18F-FDG or 131I, the lesions will be characterized as either true or false positives in comparison to the appearance of the lesion on conventional imaging (thyroid ultrasound, CT and MRI). The gold standard for an individual lesion will be FDG or 131I, if the individual lesion is positive on either imaging study. If the lesions are not seen on either FDG or 131I, then consensus reading of conventional imaging will be performed to determine true and false positives lesions. Point estimate of the true positive rate will be calculated.

Time frame: Up to 24 months

Population: One patient with qualifying FDG PET/CT underwent surgical procedures prior to undergoing \[68Ga\]Ga-PSMA-11 PET/MRI and was therefore excluded from the analysis due to lack of comparability

ArmMeasureValue (NUMBER)
Diagnostic (Gallium Ga 68-labeled PSMA-11, PET/MRI)Sensitivity of Gallium-68 PSMA for the Detection of Thyroid Cancers.65 proportion of participants
Secondary

Specificity of Gallium-68 PSMA for the Detection of Thyroid Cancers

Specificity is the agents ability to exclude the disease when the disease is absent. For each lesion detected on 18F-FDG PET or radioiodine scintigraphy (131I), the presence or absence of 68Ga-PSMA-11 uptake will be reviewed and tabulated. Presence on either 131I and 18F-FDG will be considered true positive disease. If additional lesions are detected on 68Ga-PSMA-11 as compared to 18F-FDG or 131I, the lesions will be characterized as either true or false positives in comparison to the appearance of the lesion on conventional imaging (thyroid ultrasound, CT and MRI). The gold standard for an individual lesion will be FDG or 131I, if the individual lesion is positive on either imaging study. If the lesions are not seen on either FDG or 131I, then consensus reading of conventional imaging will be performed to determine true and false positives lesions. Point estimate of the true negative rate will be reported.

Time frame: Up to 24 months

Population: One patient with qualifying FDG PET/CT underwent surgical procedures prior to undergoing \[68Ga\]Ga-PSMA-11 PET/MRI and was therefore excluded from the analysis due to lack of comparability

ArmMeasureValue (NUMBER)
Diagnostic (Gallium Ga 68-labeled PSMA-11, PET/MRI)Specificity of Gallium-68 PSMA for the Detection of Thyroid Cancers1.00 proportion of participants

Source: ClinicalTrials.gov · Data processed: Feb 4, 2026