SO sorry to hear this. In my opinion, CT can very easily miss pheochromocytoma and MIBG is more sensitive. But, MIBG scans can give false positives. Were you on any medications that might've interfered with the scan such as antihistamines? Glad you have the world experts working on the case. Were your urine metanephrines and VMA positive? I hope you don't have one, but if you do I hope they find it quick and treat you well. Keep us posted Ana