We measured antiphospholipid antibodies in sera from 94 patients with myasthenia gravis (MG). We found lgG aCL in 14/94 (14.9 % )lgM aCL in 6/94 (6.4 %) and LA in 4/56 (7.1 %) patients with MG. As a whole 21 of 94 (22.3 % ) patients with MG had some aPL. There was no correlation between the presence of aPL and the severity of MGthe presence of hyperplasia of thymustiter of the antiacetylcholine receptor antibodies or anti-single stranded DNA antibodies. Though the percentage of malignant thymoma with aPL were higher than that of malignant thymoma without aPLwe thought that aPL were not the specific antibody in malignant thymoma. In MGaPL did not play as the aCL syndrome and seemed to be non-specific antibodies
