<prompt> Thymoma is associated with:Myasthenia gravisHypergammaglobulinemiaSLEMultiple sclerosis  <response>: Approximately 75 of the patients with myasthenia gravis may have thymic abnormalities. About 30 of the patients with myasthenia gravis have thymoma. So Myasthenia gravis is the single best answer of choice. Ref: Harrisons Principles of Internal Medicine, 16th Edition, Page 2521 