Myasthenia gravis?,”The primary symptom of myasthenia gravis is muscle weakness that occurs after a period of muscle use. The extraocular muscles are most commonly involved, which may represent as double vision. The next most commonly involved muscles are the bulbar muscles of the oropharynx and jaw, which can present as jaw fatigue after prolonged chewing and/or as dysarthria with prolonged talking. About 15% of patients with myasthenia gravis have a coexisting thymoma, thus
screening CT of the chest is generally recommended.”