Most NETS are found incidentally when people are seen for other medical reasons or procedures.  In addition to a complete examination and medical history, a doctor may perform one or more tests to diagnose NETs.  Tests may include a biopsy, blood/urine tests, molecular testing, endoscopy, colonoscopy, ultrasound, ultrasound, computed tomography (CT or CAT scan), magnetic resonance imaging (MRI), nuclear medicine imaging, OctreoScan, and positron emission tomography (PET) or PET-CT scan.  For more information on NET diagnosis, go to: Neuroendocrine Tumors Diagnosis