Carotid body tumor (chemodectoma).
D002344:Carotid Body / Q000473:pathology; D002345:Carotid Body Tumor / Q000601:surgery; D005500:Follow-Up Studies; D006801:Humans; D008297:Male; D008875:Middle Aged; D010236:Paraganglioma, Extra-Adrenal / Q000473:pathology