<prompt> Which of the following condition is associated with thymoma?Myasthenia gravisRheumatoid ahritisSclerodermaRenal failure  <response>: In patients with myasthenia gravis, thymus is abnormal in 75 cases, it is hyperplastic in 65 and thymoma is present in 10 of cases. Reference: Harrisons Principles Of Internal Medicine 18th edition chapter 386. 