{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,5,25]],"date-time":"2026-05-25T04:04:29Z","timestamp":1779681869387,"version":"3.53.1"},"reference-count":15,"publisher":"Wiley","issue":"3","license":[{"start":{"date-parts":[[2026,5,4]],"date-time":"2026-05-04T00:00:00Z","timestamp":1777852800000},"content-version":"vor","delay-in-days":3,"URL":"http:\/\/creativecommons.org\/licenses\/by\/4.0\/"},{"start":{"date-parts":[[2026,5,1]],"date-time":"2026-05-01T00:00:00Z","timestamp":1777593600000},"content-version":"tdm","delay-in-days":0,"URL":"http:\/\/doi.wiley.com\/10.1002\/tdm_license_1.1"}],"content-domain":{"domain":["onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["IJU Case Reports"],"published-print":{"date-parts":[[2026,5]]},"abstract":"<jats:title>ABSTRACT<\/jats:title>\n                  <jats:sec>\n                    <jats:title>Introduction<\/jats:title>\n                    <jats:p>Extragonadal germ cell tumors (EGCT) account for approximately 3%\u20137% of all germ cell tumors. Metachronous testicular tumors develop in 5%\u20137% of patients after EGCT treatment; however, bilateral testicular tumors have not been reported.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Case Presentation<\/jats:title>\n                    <jats:p>A 30\u2010year\u2010old man underwent retroperitoneal tumor resection and was diagnosed as teratoma. A cystic lesion in the right testis without malignant features was managed by surveillance. Five years later, he presented with left testicular discomfort. Imaging revealed bilateral testicular tumors, and serum hCG was elevated (11.9 mIU\/mL). Bilateral radical orchiectomy revealed pure seminoma (pT1) in the left testis and mixed germ cell tumor with seminoma and teratoma components (pT1) in the right testis.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Conclusions<\/jats:title>\n                    <jats:p>This is the first reported case of bilateral testicular tumors developing after EGCT treatment. In patients with EGCT, the potential presence of testicular germ cell neoplasia in\u00a0situ should be considered, and long\u2010term follow\u2010up is recommended.<\/jats:p>\n                  <\/jats:sec>","DOI":"10.1002\/iju5.70190","type":"journal-article","created":{"date-parts":[[2026,5,4]],"date-time":"2026-05-04T08:52:52Z","timestamp":1777884772000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["Bilateral Testicular Tumors Recurred 5\u2009Years After Surgery for an Extragonadal Germ Cell Tumor: Case Report"],"prefix":"10.1002","volume":"9","author":[{"ORCID":"https:\/\/orcid.org\/0009-0001-1502-1715","authenticated-orcid":false,"given":"Hiraku","family":"Yamamoto","sequence":"first","affiliation":[{"name":"Department of Urology Wakayama Medical University  Wakayama Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-4542-4045","authenticated-orcid":false,"given":"Isao","family":"Hara","sequence":"additional","affiliation":[{"name":"Department of Urology Wakayama Medical University  Wakayama Japan"},{"name":"Department of Urology Hashimoto Municipal Hospital  Hashimoto Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0009-0002-4312-1147","authenticated-orcid":false,"given":"Satoshi","family":"Muraoka","sequence":"additional","affiliation":[{"name":"Department of Urology Wakayama Medical University  Wakayama Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-9101-1749","authenticated-orcid":false,"given":"Takahito","family":"Wakaymiya","sequence":"additional","affiliation":[{"name":"Department of Urology Wakayama Medical University  Wakayama Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-7402-6164","authenticated-orcid":false,"given":"Shimpei","family":"Yamashita","sequence":"additional","affiliation":[{"name":"Department of Urology Wakayama Medical University  Wakayama Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-6103-6320","authenticated-orcid":false,"given":"Yasuo","family":"Kohjimoto","sequence":"additional","affiliation":[{"name":"Department of Urology Wakayama Medical University  Wakayama 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Case of Metachronous Testicular Tumor Developing Seven Years After Complete Remission of Retroperitoneal Extragonadal Germ Cell Tumor","volume":"55","author":"Kawamura N.","year":"2009","journal-title":"Hinyokika Kiyo"},{"key":"e_1_2_9_14_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.urolonc.2010.02.008"},{"key":"e_1_2_9_15_1","doi-asserted-by":"publisher","DOI":"10.1186\/s13256\u2010021\u201002667\u2010y"},{"key":"e_1_2_9_16_1","doi-asserted-by":"publisher","DOI":"10.1034\/j.1600\u20100463.2003.1110131.x"}],"container-title":["IJU Case 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