Secretory pattern and blood pressure in pheochromocytoma

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Abstract
The diagnostic accuracy of urinary and plasma catecholamines was studied in 16 patients with pheochromocytoma. Five of 16 patients had 1 or more plasma samples within the normal range, while all 16 patients had increased urinary samples. Urinary catecholamines, therefore, have a higher diagnostic specificity than plasma catecholamines. No diurnal rhythm of catecholamine secretion was found in 7 patients in whom plasma catecholamines and blood pressure were followed for 24 hours. No correlation was found between blood pressure and plasma catecholamines in patients at rest.
Funding Information
  • Medicinska Forskningsrådet (02330)
  • Karolinska Institutet