What are the symptoms of pheochromocytoma?

95% HTN (however it is considered as a rare cause of HTN (only 0.1% of all HTN)) Episodic symptoms (catecholamine crisis) typical triad is headache, sweating and palpitation + HTN (If all positive -->90% sensitivity and 70% specificity) Other symptoms include heat, nausea, tremor, anxiety, abdominal pain, thoracic pain (due to vaso spasm) fatigue, flush (due to secretion of VIP other than NE and Epi), visual disorder.