GAD2 and cancer: However, given the association of both neurological PNS and GAD65 neurological PNS to lung cancer, patients should undergo CT/positron emission tomography-CT chest.[13] Whole body PET-CT imaging may be considered with additional neoplastic workup.[13] Patients with a concern for pancreatic malignancy should undergo appropriate abdominal imaging and advanced testing i.e. endoscopic ultrasound, CT/MRI abdomen and pelvis for diagnosis.