<prompt> All are true about the effect of thymectomy, EXCEPT:Thymectomy results in the resolution of pure red cell aplasia in 30 of patientsHypogammaglobulinemia usually responds to thymectomyPatients with myasthenia gravis have a ove thymoma is present in 10-15 of patientsThe course of myasthenia gravis is not significantly different in patients with or without thymoma  <response>: FACTS about thymectomy: Patients with myasthenia gravis have a ove thymoma is present in 10-15 of patients The course of myasthenia gravis is not significantly different in patients with or without thymoma. Thymectomy produces at least some symptomatic improvement in 65 of patients with myasthenia gravis. Thymoma patients with myasthenia gravis had a better long-term survival from thymoma resection Thymectomy results in the resolution of pure red cell aplasia in 30 of patients. Hypogammaglobulinemia rarely responds to thymectomy. Ref: Harrison, E-18, chapter e-20. 