Hypertrophy of the masseter muscles.
D000293:Adolescent; D000328:Adult; D002648:Child; D004576:Electromyography; D005260:Female; D006391:Hemangioma / Q000175:diagnosis / Q000601:surgery; D006801:Humans; D006984:Hypertrophy / Q000209:etiology; D008297:Male; D008410:Masticatory Muscles / Q000601:surgery; D009135:Muscular Diseases / Q000209:etiology / Q000473:pathology