Chemodectoma.
D000328:Adult; D005260:Female; D006258:Head and Neck Neoplasms / Q000150:complications*; D006801:Humans; D006973:Hypertension / Q000209:etiology; D010236:Paraganglioma, Extra-Adrenal / Q000150:complications*; D013575:Syncope / Q000209:etiology*