Thymoma may be associated with all the conditions, EXCEPT:: (A) Polymyositis, (B) Sjogrens syndrome, (C) Ulcerative colitis, (D) Crohns disease
Answer is D. Patients with myasthenia gravis-10-15% have thymoma. Thymoma may be associated with polymyositis, systemic lupus erythematosus, thyroiditis, Sjogren's syndrome, ulcerative colitis, pernicious anemia, Addison's disease, scleroderma, and panhypopituitarism. Ref: Harrison, E-18, Chapter e-20