Diagnostic value of various biochemical parameters for the diagnosis of pheochromocytoma in patients with adrenal mass.
Eur J Endocrinol
; 154(3): 409-17, 2006 Mar.
Article
em En
| MEDLINE
| ID: mdl-16498054
ABSTRACT
OBJECTIVE:
Pheochromocytomas are neoplasms generally characterized by the autonomous production of catecholamines. This study compared various biochemical parameters for the diagnosis of adrenal pheochromocytoma in patients with adrenal mass.DESIGN:
One hundred and fifty subjects were studied, including 24 histologically proven pheochromocytomas, 17 aldosterone-secreting and 21 cortisol-secreting adrenal adenomas and 30 nonfunctioning adrenal masses, 16 patients with essential hypertension and 42 healthy normotensive volunteers. Spontaneous blood samples and 24-h urine samples were collected prospectively.METHODS:
Plasma and urinary epinephrine and norepinephrine levels were measured by high performance liquid chromatography, whereas plasma and urinary metanephrine and normetanephrine levels were determined by radioimmunoassay (RIA). Putative ratio thresholds were calculated by receiver operating characteristic (ROC) analysis to balance between sensitivity and specificity.RESULTS:
Plasma normetanephrine was found to be the best single parameter with the highest sensitivity (91.7%) and specificity (95.6%) using a threshold of 126 pg/ml. In combination, plasma normetanephrine and metanephrine had a higher sensitivity of 95.8% with lower specificity (79.4%). All other combinations of plasma and/or urinary parameters demonstrated a lower accuracy.CONCLUSION:
Plasma metanephrines measured by RIA are reliable screening parameters for the diagnosis of pheochromocytoma.
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Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Feocromocitoma
/
Neoplasias das Glândulas Suprarrenais
Tipo de estudo:
Diagnostic_studies
/
Observational_studies
/
Prognostic_studies
Limite:
Adult
/
Female
/
Humans
/
Male
/
Middle aged
Idioma:
En
Revista:
Eur J Endocrinol
Assunto da revista:
ENDOCRINOLOGIA
Ano de publicação:
2006
Tipo de documento:
Article
País de afiliação:
Alemanha