{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,11,3]],"date-time":"2025-11-03T02:44:33Z","timestamp":1762137873518,"version":"build-2065373602"},"reference-count":20,"publisher":"Wiley","issue":"6","license":[{"start":{"date-parts":[[2025,8,28]],"date-time":"2025-08-28T00:00:00Z","timestamp":1756339200000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/creativecommons.org\/licenses\/by-nc\/4.0\/"}],"content-domain":{"domain":["onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["IJU Case Reports"],"published-print":{"date-parts":[[2025,11]]},"abstract":"<jats:title>ABSTRACT<\/jats:title>\n                  <jats:sec>\n                    <jats:title>Introduction<\/jats:title>\n                    <jats:p>Spermatocytic tumor is rare, accounting for approximately 1% of all testicular neoplasms. It is clinically and pathologically distinct from classical seminoma and typically presents as a unilateral, slow\u2010growing mass in older men.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Case Presentation<\/jats:title>\n                    <jats:p>A 54\u2010year\u2010old man presented with painless bilateral scrotal swelling. Imaging revealed heterogeneous masses in both testes, and laboratory findings were within normal limits. Left high orchiectomy revealed polygonal cells with clear cytoplasm, initially suggesting seminoma. Given the patient's age and histological features, immunohistochemistry was performed. A right high orchiectomy was subsequently conducted. Both tumors were diagnosed as spermatocytic tumors based on SALL4 positivity and PLAP, c\u2010kit, and Vimentin negativity. The patient developed postoperative hypogonadism and began testosterone replacement therapy. No recurrence was observed during 1\u2010year follow\u2010up.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Conclusion<\/jats:title>\n                    <jats:p>This rare case of synchronous bilateral spermatocytic tumor highlights the importance of considering this diagnosis in older men with bilateral testicular masses. Immunohistochemistry is essential for accurate identification.<\/jats:p>\n                  <\/jats:sec>","DOI":"10.1002\/iju5.70075","type":"journal-article","created":{"date-parts":[[2025,8,28]],"date-time":"2025-08-28T16:40:26Z","timestamp":1756399226000},"page":"553-557","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["A Case of Synchronous Bilateral Spermatocytic Tumor"],"prefix":"10.1002","volume":"8","author":[{"ORCID":"https:\/\/orcid.org\/0009-0006-0869-5814","authenticated-orcid":false,"given":"Mao","family":"Saito","sequence":"first","affiliation":[{"name":"Department of Urology Tohoku University Graduate School of Medicine  Sendai Japan"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-8339-5164","authenticated-orcid":false,"given":"Hiromichi","family":"Katayama","sequence":"additional","affiliation":[{"name":"Department of Urology Tohoku University Graduate School of Medicine  Sendai Japan"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Satoko","family":"Sato","sequence":"additional","affiliation":[{"name":"Department of Pathology Tohoku University Graduate School of Medicine  Sendai Japan"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Sota","family":"Oguro","sequence":"additional","affiliation":[{"name":"Department of Diagnostic Radiology Tohoku University Graduate School of Medicine  Sendai Japan"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Takuro","family":"Goto","sequence":"additional","affiliation":[{"name":"Department of Urology Tohoku University Graduate School of Medicine  Sendai Japan"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Yohei","family":"Satake","sequence":"additional","affiliation":[{"name":"Department of Urology Tohoku University Graduate School of Medicine  Sendai Japan"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Takuma","family":"Sato","sequence":"additional","affiliation":[{"name":"Department of Urology Tohoku University Graduate School of Medicine  Sendai Japan"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Yoshihide","family":"Kawasaki","sequence":"additional","affiliation":[{"name":"Department of Urology Tohoku University Graduate School of Medicine  Sendai Japan"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Naoki","family":"Kawamorita","sequence":"additional","affiliation":[{"name":"Department of Urology Tohoku University Graduate School of Medicine  Sendai Japan"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Akihiro","family":"Ito","sequence":"additional","affiliation":[{"name":"Department of Urology Tohoku University Graduate School of Medicine  Sendai Japan"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"311","published-online":{"date-parts":[[2025,8,28]]},"reference":[{"key":"e_1_2_10_2_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.juro.2007.03.024"},{"key":"e_1_2_10_3_1","doi-asserted-by":"publisher","DOI":"10.3390\/ijms24119529"},{"key":"e_1_2_10_4_1","doi-asserted-by":"publisher","DOI":"10.1158\/0008-5472.CAN-05-2936"},{"key":"e_1_2_10_5_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.canep.2018.05.007"},{"key":"e_1_2_10_6_1","doi-asserted-by":"publisher","DOI":"10.1007\/s00432-019-03056-1"},{"issue":"9","key":"e_1_2_10_7_1","first-page":"525","article-title":"A Case Report of Bilateral Spermatocytic Seminoma","volume":"57","author":"Maruta S.","year":"2011","journal-title":"Acta Urologica Japonica"},{"key":"e_1_2_10_8_1","doi-asserted-by":"publisher","DOI":"10.1016\/0046-8177(94)90062-0"},{"key":"e_1_2_10_9_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.urology.2020.10.002"},{"key":"e_1_2_10_10_1","doi-asserted-by":"publisher","DOI":"10.1177\/1066896910388645"},{"key":"e_1_2_10_11_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.eucr.2021.101732"},{"key":"e_1_2_10_12_1","doi-asserted-by":"publisher","DOI":"10.4111\/kju.2013.54.12.884"},{"key":"e_1_2_10_13_1","doi-asserted-by":"publisher","DOI":"10.5114\/wo.2017.66660"},{"issue":"4","key":"e_1_2_10_14_1","first-page":"399","article-title":"European Association of Urology Guidelines on Testicular Cancer: 2023 Update","volume":"84","author":"Patrikidou A.","year":"2023","journal-title":"European Urology"},{"issue":"10","key":"e_1_2_10_15_1","first-page":"753","article-title":"Bilateral Spermatocytic Seminoma: Report of a Case","volume":"14","author":"Tomoyoshi T.","year":"1968","journal-title":"Hinyokika Kiyo"},{"key":"e_1_2_10_16_1","first-page":"2205","article-title":"Spermatocytic Seminoma. 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