GLP1R and neoplasm: Brand et al. [95] developed a bimodal imaging probe (PET/fluorescence) for imaging GLP-1R expression in the pancreas and in pancreatic islet cell tumors preoperatively, allowing the diagnosis of primary growths and metastases in a whole-body imaging setting as well as intra-operatively for the real-time detection of tumor margins, infiltrative growth, or residual tumor cells in a surgical cavity.