GLP1R and pancreatic insulinoma: Therefore, PETs using SSTR agents are not useful in benign insulinoma.51 In contrast, imaging methods using GLP-1 receptor agents like the 68 Ga-NOTA-MAL-cys40-exendin-4 PET/CT can visualize insulinoma with a sensitivity of 97.7%.52,53 There were only two patients with a Ga-DOTATOC-PET, one with an accurate localization and one with a questionable signal close to the jejunum (Table 1).