In order to allow for a comprehensive staging in patients with suspected malignant insulinomas, the incidence and density of peptide receptor status in 11 patients with malignant insulinomas were established in vivo using GLP-1R and SSTR2 imaging and/or in vitro using autoradiography of the tumor samples (Wild et al. 2011). Here, SSTR2 is linked to pancreatic insulinoma.