Thymomas and thymic carcinomas are epithelial tumors of the thymus. The term, thymoma, is customarily used to describe neoplasms that show no overt atypia of the epithelial component. A thymic epithelial tumor that exhibits clear-cut cytologic atypia and histologic features no longer specific to the thymus is known as a thymic carcinoma (also known as type C thymoma).
Incidence and Mortality
Invasive thymomas and thymic carcinomas are relatively rare tumors, which...
Added text to state that radiation therapy for clinical stage I testicular seminoma is no longer favored because of evidence that this treatment is associated with an increased risk of secondary malignancies and an increased risk of death from secondary malignancies. Also added that an analysis of data from the population-based Surveillance, Epidemiology, and End Results (SEER) registries in the United States between the years 1973 and 2001 indicated that among 7,179 men receiving radiation therapy for stage I seminoma, 246 had an increased risk of death from second cancers compared with the general population (cited Beard et al. as reference 19). Added that an international study of more than 40,000 testis cancer survivors reported that among the 7,885 survivors who had been followed for 20 to 29 years, radiation therapy was associated with a doubling of the risk of secondary cancers (cited Travis et al. as reference 20).
This summary is written and maintained by the PDQ Adult Treatment Editorial Board, which is editorially independent of NCI. The summary reflects an independent review of the literature and does not represent a policy statement of NCI or NIH. More information about summary policies and the role of the PDQ Editorial Boards in maintaining the PDQ summaries can be found on the About This PDQ Summary and PDQ NCI's Comprehensive Cancer Database pages.
In this article
This information is produced and provided by the National
Institute (NCI). The information in this topic may have changed since it was written. For the most current information, contact the National
Institute via the Internet web site at http://
.gov or call 1-800-4-CANCER.
WebMD Public Information from the National Cancer Institute
This information is not intended to replace the advice of a doctor.
Healthwise disclaims any liability for the decisions you make based on this