Development of a thymectomy trial in nonthymomatous myasthenia gravis patients receiving immunosuppressive therapy.

Thymectomy has been regularly used in the management of nonthymomatous autoimmune myasthenia gravis (MG), but its benefits have not been established in a randomized, controlled trial. The widespread use of thymectomy in MG patients without thymoma is largely based on retrospective, nonrandomized case series that have produced a consensus that the procedure is sometimes beneficial. Still, the benefits and utilization of thymectomy are actively debated among MG experts. In this paper, we describe the development of a multicenter, international trial to determine whether extended transsternal thymectomy reduces corticosteroid requirements for patients with generalized AChR antibody-positive nonthymomatous MG.