Myasthenia gravis with thymoma and coexistent central hypothyroidism.

Myasthenia gravis (MG) is a well-known acquired autoimmune neuromuscular disorder. Patients with MG have a higher incidence of autoimmune disease than the normal population. MG is frequently associated with autoimmune thyroid disease, the most common of which is thyrotoxicosis. Associated hypothyroidism is not common, and the central (pituitary) origin, to our knowledge, has not yet been reported. We report an MG patient with thymoma that coexisted with central hypothyroidism, the correction of which is mandatory and significant to achieve remission.