title: The primary head and neck manifestations of myasthenia gravis and amyotrophic lateral sclerosis: a diagnostic aid.
mesh_terms: D000328:Adult; D000368:Aged; D000690:Amyotrophic Lateral Sclerosis / Q000175:diagnosis*; D006257:Head; D006801:Humans; D008875:Middle Aged; D009157:Myasthenia Gravis / Q000175:diagnosis*; D009333:Neck