Thymic epithelial neoplasms.

摘要: We studied 57 tumors of the thymus seen at Vanderbilt University Medical Center between 1957 and 1982. By applying current diagnostic criteria, classification 13 was changed. There were 45 epithelial thymus, including 32 thymomas, two thymic carcinomas, eight carcinoids, three germinomas. The gross microscopic features these neoplasms overlap each other several tumors, but with knowledge variations it usually possible to establish a diagnosis light microscopy. In more difficult cases, electron microscopy most useful method. New developments in immunologic staining also value. thymoma used for circumscribed invasive epithelium without anaplasia. Cytologically malignant classified as carcinoma. Thymic carcinomas aggressive than thymomas not associated syndromes such myasthenia gravis or anemia. carcinoids frequently aggressive, them produced corticotrophin calcitonin. germinomas histologically identical testicular seminoma, may be confused because their lymphocytic infiltrate. Invasive radiosensitive.