It has been known for over half a century that the thymus is in some way involved in myasthenia gravis. In recent years several other diseases have been found associated with, or developing after, the removal of a thymic tumor, including such seemingly diverse entities as erythroid hypoplastic (aregenerative) anemia, acquired idiopathic hypogammaglobulinemia, and Cushing's syndrome. Granulomatous myocarditis and polymyositis have also been reported with such a growth. The occurrence of a thymic neoplasm in association with these disorders
RUBIN M, STRAUS B, ALLEN L. Clinical Disorders Associated With Thymic Tumors. Arch Intern Med. 1964;114(3):389–398. doi:10.1001/archinte.1964.03860090123013
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