This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Autoimmune Diseases, Subject name: Pathology
Thymic hyperplasia is seen in - 
Select and explain. 
A. Thymoma, B. Thymic lymphoma, C. Myasthenia gravis, D. Scleroderma
C: Myasthenia gravis
Answer: C: Myasthenia gravis 
Explanation: Ans. is 'c' i.e., Mysthenia gravis Thymic hyperplasiao The term thymic hyperplasia usually applies to the appearance of B-cell germinal centers within the thymus, a finding that is referred to as thymic follicular hyperplasia.o Such B-cell follicles are present in only small numbers in the normal thymus.o It can occur in a number of chronic inflammatory and immunologic states, but it is most frequently encountered in myasthenia gravis (65% to 75% of cases).o Similar thymic changes are sometimes encountered in Graves disease, systemic lupus erythematosus, scleroderma, rheumatoid arthritis, and other autoimmune disorders.