SSTR1 and meningioma: A novel imaging modality for the diagnosis, surgical resection and radiotherapy treatment volume planning, as well as the post-treatment monitoring of meningiomas, is positron emission tomography (PET) using somatostatin receptor (SSTR) ligands, namely Gallium-68-labeled DOTATATE since the majority of meningiomas express SSTR1/2 [57,58,59].