Table 5.

Tumour diameters and catecholamine concentrations, plasma catecholamines and metanephrines and tumour catecholamine release in non-syndromic phaeochromocytomas

	Noradrenergic (n = 11)	Adrenergic (n = 15)
Mean tumour diameter (cm)	3.6±0.4	5.0±0.6
Tumour catecholamines
Noradrenaline (μmol/g)	11.5±4.5	20.0±7.5
Adrenaine (μmol/g)	0.1±0.0	12.1±2.9***
Plasma catecholamines
Noradrenaline (nmol/l)	25.3±7.6	9.1±2.5**
Adrenaline (nmol/l)	0.4±0.1	2.76±0.9**
Plasma metanephrines
Normetanephrine (nmol/l)	10.8±2.9	8.5±2.9
Metanephrine (nmol/l)	0.6±0.2	4.89±1.2***
Tumour catecholamine release
(nmol/l per g tumour tissue)	1.48±0.49	0.32±0.08**
(nmol/l per mmol tumour catecholamine)	200±88	34±11*

All values are means±s.e.m.

^*P < 0.05

^**P < 0.01

^***P < 0.001.