Smeltzer 1956 . An MRI scan shows an enlargement of the thymus gland , a result in 90 of cases (Smeltzer 1956 . The initial manifestation of the disease is ocular muscle weakness as exhibited by the drooping of the eyelids or ptosis and double vision or diplopia (Smeltzer 1956 . Other signs and symptoms of the disease include weakness of the muscles of the face and throat , facial muscle weakness shown by a bland facial expression , generalized weakness that affects all extremities and...











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