phaeochromocytoma

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phaeochromocytoma (fi-oh-kroh-moh-sy-toh-mă) n. a small vascular tumour of the medulla of the adrenal gland. Many of these tumours function by their uncontrolled and irregular secretion of the hormones adrenaline and noradrenaline. They cause attacks of raised blood pressure, increased heart rate, palpitations, and headache.

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