BACKGROUND Many histologic classifications of thymic epithelial tumors have been reported to date, but to the authors' knowledge, none of them closely reflect the clinical behavior or prognosis of the tumor. Therefore, it is necessary to establish a biologic marker for thymic epithelial tumors. Variants of CD44 may be important in promoting tumor progression and metastasis. Accordingly, the exp...

(atypical thymoma); and those showing total loss of the organotypical features of the thymus and displaying overt cytologic evidence of malignancy correspond to high-grade or poorly differentiated thymic epithelial neoplasms (also designated, by convention, thymic carcinoma) (2,4). The grading is based on a combination of architectural and cytological parameters as observed on routine microscop...

Thymomas and thymic carcinoma are rare neoplasms. Surgical resection is the cornerstone of effective therapy. Stage I disease is effectively treated by complete surgical resection. The role of radiation therapy in completely resected stage II disease remains controversial. Adjuvant radiation therapy is useful for local control and may improve survival in patients with incompletely resected tumo...

CD98 has been associated with tumor growth and is highly expressed in human neoplasms. The aim of this study was to evaluate the clinicopathological significance of CD98 expression in thymic epithelial tumors. Forty-nine patients with thymic epithelial tumors were included in this study. Tumor sections were stained by immunohistochemistry for CD98; vascular endothelial growth factor (VEGF); mic...

The morphologic classification of thymoma has undergone numerous revisions in recent years and has been under continuous debate for the past several decades. With the introduction of the World Health Organization (WHO) schema for the classification of thymic epithelial neoplasms in 1999, a major step was taken toward achieving uniformity in the nomenclature of these tumors. A more recent iterat...

BACKGROUND To evaluate the expression and differential significance of c-Jun, p73, Casp-9 and N-ras in thymic epithelial tumors (TETs) with the aim to provide useful information for tumor biology and prospective therapy. METHODS In this study, we analyzed the expression of four chromosome 1-related genes, namely c-Jun, p73, Casp-9 and N-ras, in 60 cases of thymic epithelial tumors. The tumors...

SUMMARY A histologic survey has been made of all neoplasms found in slaughtered catde, sheep, and pigs during one year in 100 abattoirs throughout Great Britain. A total of 302 tumors from cattle, 107 from sheep, and 139 from pigs was collected. The specimens included 16 thymomas (15 from cattle and one from sheep) and 80 thymic lymphosarcomas (40 from cattle, 5 from sheep, and 35 from pigs). T...