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pheochromocytoma |
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pheochromocytoma [‚fē·ō‚krō·mō·sī ′tō·mə] (medicine) A tumor of the sympathetic nervous system composed principally of chromaffin cells; found most often in the adrenal medulla. 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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In female rats, there was a positive trend in the occurrence of benign or malignant pheochromocytomas (mainly benign) of the adrenal medulla, but this equivocal result could not be attributed with confidence to exposure to 2-butoxyethanol. Although pheochromocytomas are rare, identifying the disease is critical because patients often exhibit few to no symptoms. In male rats treated with phenol in drinking water, increased incidences of leukemia, pheochromocytomas of the adrenal gland, and c-cell carcinomas of the thyroid gland were found; however; these occurred only in the lower-dose group and not in high-dose male rats or in female rats or mice (61,62). |
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