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  • Title: [Neurofilament expression in thymic epithelial tumors and anti-axonal autoantibodies in myasthenia gravis: a model for autoimmunity by abnormal T cell selection].
    Author: Marx A, Kirchner T, Greiner A, Schalke B, Müller-Hermelink HK.
    Journal: Verh Dtsch Ges Pathol; 1992; 76():256-61. PubMed ID: 1283271.
    Abstract:
    Thymic epithelial tumors from myasthenia gravis (MG) patients and non-neoplastic thymuses were investigated by immunohistochemistry for the expression of neurofilament (NF) epitopes. There was little immunoreactivity confined to the medulla in non-neoplastic thymuses and a faint staining only for a 200 kD NF epitope in medullary and mixed thymomas. In contrast, cortical thymomas and well-differentiated thymic carcinomas expressed epitopes of the 68 kD and 160 kD NF. Demonstrating anti-axonal and anti-NF autoantibodies in thymoma patients we conclude that "false-positive T cell selection" is a mechanism of autoimmunity in paraneoplastic MG.
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