Octreoscan is the imaging technique of choice in addition to CT scan and MRI. In appropriate cases, Neotect Scan, FDG PET scan or F18 Dopa PET Scan and MIBG Scan in expert hands are useful. Measurement of urine and blood catecholamine could unmark a pheochromocytoma which causes flushing , fluctuating blood pressure and even diarrhea.
