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      Thymoma: results of a multicentric retrospective series of 149 non-metastatic irradiated patients and review of the literature. FNCLCC trialists. Fédération Nationale des Centres de Lutte Contre le Cancer.

      Radiotherapy and Oncology
      Adolescent, Adult, Aged, Aged, 80 and over, Cause of Death, Combined Modality Therapy, Humans, Middle Aged, Neoplasm Metastasis, Neoplasm Staging, Retrospective Studies, Survival Analysis, Thymoma, mortality, radiotherapy, Thymus Neoplasms

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          Between 1979 and 1990, 149 patients with non-metastatic thymomas were treated in ten French cancer centers. Patients were staged according to the 'GETT' classification, derived from that of Masaoka. There were 13 stage I patients, 46 stage II, 58 stage III and 32 stage IVA. Gross total resections were performed in 63 cases, subtotal resections in 31 cases and in 55 cases a biopsy alone was performed. All patients received radiotherapy and 74 were given post-operative chemotherapy. Median follow-up was 7.7 years. Local control was achieved in 117 cases (78.5%) and was influenced by the stage of the disease (p < 0.01) and the extent of surgery (p < 0.01). Twenty-six patients developed metastatis after a median period of 9 months. Five- and ten-year disease-free survival rates were 59.5% (51-67%) and 49.5% (39-60%), respectively, and were influenced by the stage of the disease (p < 0.01), the extent of surgery (p < 0.001) and a mediastinal compression on presentation (p = 5 x 10(-6)). Four factors could predict a worse overall survival in the multivariate analysis: mediastinal compression on presentation (p < 0.001), absence of chemotherapy (p < 0.001), biopsy alone (p = 0.003), and young age (p = 0.013). A worse DFS was predicted by mediastinal compression on presentation (p < 0.001), absence of chemotherapy (p < 0.001), young age (p = 0.006), and stages III-IVA (p = 0.04). Future therapeutic strategies are discussed and the literature is reviewed.

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