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Prognostic factors of stage I thymic epithelial tumors

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Abstract

Objective

According to the tumor-node-metastasis classification for thymic malignancies, the proportion of patients diagnosed with stage I is expected to increase significantly. However, whether those patients have homogenous clinicopathological features and survival has not been fully evaluated.

Methods

We reviewed 153 consecutive patients with stage I thymic epithelial tumors (133 thymomas, 15 thymic carcinomas, and 5 neuroendocrine tumors) who underwent complete resection at our institution between 2001 and 2016 and evaluated the prognostic significance of their clinicopathological factors.

Results

The stage I patients accounted for 78% of all thymic epithelial tumors. The 5-year overall survival and recurrence-free survival rates of the 153 patients were 94% and 80%, respectively. The patients with the histology of thymic carcinoma or neuroendocrine tumor and with a tumor larger than 5.0 cm showed significantly worse recurrence-free survival in multivariate analysis (p = 0.027 and 0.038, respectively). Only the tumor size was revealed as a significant prognostic factor for recurrence-free survival when limited in the 133 cases of thymoma (p = 0.048).

Conclusions

Patients with large tumors showed significantly worse recurrence-free survival than those with small tumors both in stage I thymic epithelial tumors and thymomas.

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Acknowledgements

The authors thank Dr. Hisashi Tateyama for the diagnosis of all tumors in this study.

Funding

This work was not supported by any specific grant from funding agencies in the public, commercial, or not-for-profit sectors.

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Correspondence to Takayuki Fukui.

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Fukui, T., Kadomatsu, Y., Tsubouchi, H. et al. Prognostic factors of stage I thymic epithelial tumors. Gen Thorac Cardiovasc Surg 69, 59–66 (2021). https://doi.org/10.1007/s11748-020-01427-x

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  • DOI: https://doi.org/10.1007/s11748-020-01427-x

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