Giant Cystic Pheochromocytoma with Low Risk of Malignancy: A Case Report and Literature Review

Table 1

Biochemical investigations confirming the pheochromocytoma diagnosis.

	Patient values	Normal values
Test (fractionated plasma)
Metanephrine	259 pg/mL	<58 pg/mL
Normetanephrine	4603 pg/mL	<149 pg/mL
Total metanephrine	4862 pg/mL	<206 pg/mL
Epinephrine	16 pg/mL	<84 pg/mL
Norepinephrine	509 pg/mL	<420 pg/mL
Dopamine	<30 pg/mL	<60 pg/mL
Total catecholamines	525 pg/mL	<504 pg/mL
Test (24-hour urine values)
Total catecholamines	131 ug/24 hr	<100 ug/24 hr
Norepinephrine	120 ug/24 hr	<80 ug/24 hr
Epinephrine	11 ug/24 hr	<20 ug/24 hr
Dopamine	466 ug/24 hr	<500 ug/24 hr
Vanillylmandelate (VMA)	88.3 ug/24 hr	3.8–6.7 mg/24 hr
Creatinine	1.47 ug/24 hr	0.63–2.50 g/24 hr