What is the prognosis of myasthenia gravis?

With treatment, the outlook for most patients with myasthenia gravis is bright: they will have significant improvement of their muscle weakness, and they can expect to lead normal or nearly normal lives. Some cases of myasthenia gravis may go into remission temporarily, and muscle weakness may disappear completely so that medications can be discontinued. Stable, long-lasting, complete remissions are the goal of thymectomy. In a few cases, the severe weakness of myasthenia gravis may cause a crisis (respiratory failure), which requires immediate emergency medical care.

This answer is based on source information from the National Institute of Neurological Disorders and Stroke.