Myasthenia Gravis: A Clinical and Pathological Study of a Case Associated with a Primary Mediastinal Thymoma and a Solitary Secondary Intrapulmonary Thymoma

Abstract
THE tumor of the thymus occurring in about a sixth of the patients presenting the symptoms of myasthenia gravis is usually encapsulated and slowly growing and is generally regarded as a benign neoplasm. It has been called a thymoma.1 Ten per cent or less of such thymomas encroach upon and extend by continuity into the adjacent pleura, lungs, pericardium or superior vena cava. Separate, discrete, secondary deposits of such thymomas occasionally found at a distance on the pleura have been interpreted as implants and not as true metastases.1 , 2 Separate, discrete, secondary metastases from such thymomas in other organs have not . . .

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