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phaeochromocytoma |
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phaeochromocytoma see pheochromocytoma. pheochromocytoma, phaeochromocytoma a small chromaffin cell tumor, usually located in the adrenal medulla but occasionally occurring in chromaffin tissue of the sympathetic paraganglia. It occurs most often in dogs and cattle; in bulls it develops concurrently with C-cell tumors of the thyroid gland. Functional tumors secrete catecholamines, causing arteriolar sclerosis and medial hyperplasia and clinical signs of hypertension: tachycardia, edema and cardiac hypertrophy. How to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit webmaster's page for free fun content. |
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