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Extragonadal germ cell tumors and unrecognized germ cell tumors. Semin Oncol 1992; 19: 119\u201327."},{"key":"2","doi-asserted-by":"crossref","unstructured":"2) Takeda S, Miyoshi S, Ohta M, et al. Primary germ cell tumors in the mediastinum: a 50-year experience at a single Japanese institution. Cancer 2003; 97: 367\u201376.","DOI":"10.1002\/cncr.11068"},{"key":"3","doi-asserted-by":"crossref","unstructured":"3) International Germ Cell Cancer Collaborative Group. International germ cell consensus classification: a prognostic factor-based staging system for metastatic germ cell cancers. J Clin Oncol 1997; 15: 594\u2013603.","DOI":"10.1200\/JCO.1997.15.2.594"},{"key":"4","doi-asserted-by":"crossref","unstructured":"4) Sakurai H, Asamura H, Suzuki K, et al. Management of primary malignant germ cell tumor of the mediastinum. 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European consensus conference on diagnosis and treatment of germ cell cancer: a report of the second meeting of the European Germ Cell Cancer Consensus Group (EGCCCG): part II. Eur Urol 2008; 53: 497\u2013513.","DOI":"10.1016\/j.eururo.2008.03.017"},{"key":"14","unstructured":"14) Fukushima Y, Shirahashi K, Komuro H, et al. Subxiphoid robot-assisted complete resection for postchemotherapy primary mediastinal yolk sac tumour. Multimed Man Cardiothorac Surg 2024; 2024: mmcts.2023.103."},{"key":"15","doi-asserted-by":"crossref","unstructured":"15) Zheng R, Devin LC, O\u2019Malley T, et al. Surgical management of growing teratoma syndrome: robotic-assisted thoracoscopic resection of mediastinal teratoma. Surg Endosc 2020; 34: 1019\u201323.","DOI":"10.1007\/s00464-019-07177-z"},{"key":"16","doi-asserted-by":"crossref","unstructured":"16) G\u00e9czi T, Simonka Z, Lantos J, et al. 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