Nanjing First Hospital, Nanjing Medical University
Since GLP-1R is expressed in human β-cells and highly overexpressed in insulinomas，multiple GLP-1R-targeted radiopharmaceuticals were devoted to insulinoma localization imaging.68Ga-NOTA-MAL-Cys39-exendin-4 is an optimal probe targeting GLP-1R. A single dose of 111-185 Mega-Becquerel (MBq) 68Ga-NOTA-MAL-Cys39-exendin-4 will be injected intravenously. Visual and semiquantitative method will be used to assess the PET/CT images.The investigators will determine the use of 68Ga-NOTA-MAL-Cys39-exendin-4 PET/CT in the detection of insulinomas, and to compare its diagnostic value with conventional imaging.
Age
18–75
Sex
ALL
Healthy volunteers
Not accepted
You may be eligible if
1. The patient volunteers and signs an informed consent form.
2. age ≥18 and ≤75 years old;
3. Patients with hypoglycaemia in the presence of neuroglycopenic symptoms and documented Whipple's triad;
4. Biochemically proven endogenous hyperinsulinemic hypoglycaemia (plasma glucose concentration \<3.0 mM, insulin \>3 µU/ml, and C-peptide \>0.6 ng/ml);
5. Conventional imaging within 3 month.
You may not be if
1. Having a history of allergy to similar drugs, allergic constitution or suffering from allergic diseases;
2. Breast feeding;
3. Pregnancy or the wish to become pregnant within 6 months;
4. Renal function: serum creatinine \> 3.0 mg/dl;
5. Any medical condition that, in the opinion of the investigator, may significantly interfere with study compliance.
