Table 1.

24-hour urine catecholamines and 24-hour urine fractionated metanephrines taken shortly after the first presentation

Investigation	Results	Reference range
24-hour urinary catecholamines
Norepinephrine	48 nmol/day	89–473 nmol/day
Dopamine	392 nmol/day	424–2611 nmol/day
Epinephrine	5.5 nmol/day	2.7–109.2 nmol/day
24-hour urinary fractionated metanephrine, normetanephrine and 3-MT
Metanephrine	0.41 µmol/L	0.33–1.53 µmol/L
Normetanephrine	1.18 µmol/L	0.88–2.88 µmol/L
3-MT	0.50 µmol/L	0.60–2.60 µmol/L

3-MT, 3-methoxytyramine.