Exercise and the Stress System

George Mastorakos, Maria Pavlatou, Evanthia Diamanti-Kandarakis, George P. Chrousos

Download PDF

Exercise represents a physical stress that challenges homeostasis. In response to this stressor, autonomic nervous system and the hypothalamic-pituitary-adrenal axis are known to react and to participate in the maintenance of homeostasis. This includes elevation of cortisol and cathecholamines in plasma. However, sustained physical conditioning in highly trained athletes is associated…

Symptomatic pheochromocytoma with normal urinary catecholamine metabolites

Dimitra Zianni, Marinella Tzanela, Serafim Klimopoulos, N.C. Thalassinos

Download PDF

A 61-year old female presented with paroxysmal hypertension and a 4.5cm left adrenal mass on CT scan. Repeated measurements of 24-hour urinary fractionated metanephrines, total catecholamines and vanillylmandelic acid (VMA) were within normal range. A further scintigraphic study …