in a retrospective study of 58 thymomas and 13 thymic carcinomas , malignant invasive character as well as the occurrence of myasthenia gravis were both found to be related to the neoplastic proliferation of the cortical epithelial cells , whereas in the usual mixed type of thymoma and the medullary type no gross invasion or metastases were noticed .
C0205969
thymic carcinomas
C1513959
neoplastic