Pheochromocytomas (pronounced fee-oh-kroh-moh-sigh-TOH-muh; often abbreviated as pheo,) and paragangliomas (pronounced pair-uh-gang-lee-OH-muh; often abbreviated as para,) are rare types of tumors. Pheochromocytomas form in the adrenal glands, while closely related paragangliomas originate from cells of neuronal origin, which can be located throughout the neck, chest, abdomen, or pelvis. These tumors can produce hormones that control normal body stress reaction and other functions, including heart rate and blood pressure. The NICHD supports and conducts research on pheochromocytoma and paraganglioma to understand the causes of the disease, improve the detection methods, and develop effective therapies.
On this webpage, the term pheochromocytoma also refers to paraganglioma unless otherwise specified.
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- Pheochromocytoma (pronounced fee-oh-kroh-moh-sigh-TOH-muh)
- Paraganglioma (pronounced pair-uh-gang-lee-OH-muh)