Source:http://linkedlifedata.com/resource/umls/id/C0030422
MSH: 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),NCI: A benign or malignant paraganglioma arising from sympathetic or parasympathetic paraganglia outside the adrenal gland.