Abstract
We describe the first reported case, in an 82-year-old man, of erythrocytosis caused by an erythropoietin (EPO)-producing thymic carcinoma. The patient underwent computed tomography-guided fine-needle aspiration of a 6-cm anterior mediastinal mass, and histological findings revealed thymic squamous cell carcinoma. The existence of EPO was confirmed immunohistochemically using the tumor tissue. Postoperative clinical improvement of erythrocytosis and the decline of EPO suggest a paraneoplastic nature of erythrocytosis as seen in this patient.
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Acknowledgments
This study was supported in part by a grant for clinical cancer research from the Ministry of Health, Labor and Welfare of Japan. We would like to thank the staff of the Hematology Division of the Tokyo Metropolitan Cancer and Infectious Diseases Center, Komagome Hospital, for their excellent patient care.
Conflict of interest statement
W. Munakata, K. Ohashi, K. Sakaguchi, H. Horio, T. Hishima, H. Akiyama, and H. Sakamaki received a grant for clinical cancer research from the Ministry of Health, Labour and Welfare of Japan.
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Munakata, W., Ohashi, K., Sakaguchi, K. et al. Erythrocytosis caused by erythropoietin-producing thymic carcinoma. Int J Clin Oncol 15, 220–223 (2010). https://doi.org/10.1007/s10147-010-0029-x
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DOI: https://doi.org/10.1007/s10147-010-0029-x