Abstract
THE first modern clinical and pathological descriptions of the disease that was to be named myasthenia gravis1 were made by Wilks,2 Erb3 and Goldflam.4 Only a few years later, in 1901, Weigert5 first described the association of a thymic tumor with myasthenia.By 1917 Bell6 had collected 56 autopsied cases of myasthenia, with a benign tumor of the thymus in 10 and a generalized enlargement of the gland in 17 others. Thus, approximately 50 per cent of the patients had thymic abnormalities. In 1936 Norris7 reported similar figures among 80 cases collected to that date in which the thymus had . . .