Paraganglioma, Extra-Adrenal

**Definition:** A relatively rare, usually benign neoplasm originating in the chemoreceptor tissue of the CAROTID BODY; GLOMUS JUGULARE; GLOMUS TYMPANICUM; AORTIC BODIES; and the female genital tract. It consists histologically of rounded or ovoid hyperchromatic cells that tend to be grouped in an alveolus-like pattern within a scant to moderate amount of fibrous stroma and a few large thin-walled vascular channels. (From Stedman, 27th ed)

**Tree numbers:** - C04.557.465.625.650.700.705 - C04.557.580.625.650.700.705

**Synonyms:** - Chemodectoma - Chemodectomas - Paraganglioma, Non-Chromaffin - Paraganglioma, Nonchromaffin - Paragangliomas, Familial Nonchromaffin, 1