This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: C.N.S., Subject name: Medicine
Thymoma is associated with- 
Select and explain. 
A. Myasthenia gravis, B. Polycythemia, C. Ectopic ACTH, D. Polyarteritis nodosa
A: Myasthenia gravis
Answer: A: Myasthenia gravis 
Explanation: Ans. is 'a' i.e., Myasthenia gravis o Thymomas are associated with a wide variety of paraneoplastic disorders the most common of which is mvaesthenia graviso Mvaesthenia eravis is seen in about 30-40% cases of ThymomaParaneoplastic syndromes associated with ThymomaAutoimmuneEndocrine disordersNeuromuscular syndromeHematological disorderso Systemic lupuso Addison s diseaseo Myasthenia graviso Red cell aplasiaerythematosiso Hyperthyroidismo Eaton lambert syndromeo Hypogamma globuline-o Polymyositiso Hyperparathyroidismo Myotonic dystrophymiao Myocarditiso Panhypopituitarismo Myositiso T-cell deficiency>o Sjogren s Syndrome syndromeo Ulcerative colitis o Pancytopeniao Hashimotos thyroiditis o Erythrocytosiso Rheumatoid arthritis o Amegakargocytico Sarcoiffosis thrombocytopeniao Scleroderma Miscellaneouso Hypertrophic pulmonary osteoarthropathyo Nephrotic syndromeo Minimal change nephropathyo Pemphiguso Chronic mucocutaneous candidiasis