Thymic neoplasms.

Thymomas are infrequent and relatively indolent mediastinal tumors. They are usually encapsulated and readily removed. Invasive tumors, even if completely resected, require additional therapy. Although efforts have been made to relate histopathologic characteristics to outcome, the most important prognostic factors are stage and ability to achieve complete resection. The responsiveness of these tumors to chemotherapy and radiation therapy has led to combining all three modalities in a consistent sequence to derive maximal benefit from each to outcome in patients with locally advanced stage tumors.