{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,9,17]],"date-time":"2026-09-17T00:53:14Z","timestamp":1789606394623,"version":"build-2803163510"},"reference-count":15,"publisher":"Wiley","issue":"4","license":[{"start":{"date-parts":[[2025,4,29]],"date-time":"2025-04-29T00:00:00Z","timestamp":1745884800000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"content-domain":{"domain":["onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["IJU Case Reports"],"published-print":{"date-parts":[[2025,7]]},"abstract":"<jats:title>ABSTRACT<\/jats:title><jats:sec><jats:title>Introduction<\/jats:title><jats:p>Urinary tract villous adenomas are uncommon, urachal villous adenomas being especially rare. While their malignant potential remains uncertain, villous adenomas may have malignant components. Here, we present a case of the coexistence of a urachal villous adenoma and urachal carcinoma.<\/jats:p><\/jats:sec><jats:sec><jats:title>Case Presentation<\/jats:title><jats:p>We report the case of an 86\u2010year\u2010old woman with a urachal tumor of the bladder wall. A biopsy yielded a diagnosis of villous adenoma. Because of the possibility of coexisting malignancy, we performed a partial cystectomy, including excision of the umbilical ligament. Examination of the operative specimen revealed mucinous adenocarcinoma. She has remained recurrence\u2010free for 8\u2009months postoperatively.<\/jats:p><\/jats:sec><jats:sec><jats:title>Conclusion<\/jats:title><jats:p>We here report the coexistence of a villous adenoma and mucinous adenocarcinoma of the urachus. Because urachal villous adenomas can have malignant components, they require aggressive treatment. This rare combination should be kept in mind.<\/jats:p><\/jats:sec>","DOI":"10.1002\/iju5.70035","type":"journal-article","created":{"date-parts":[[2025,4,30]],"date-time":"2025-04-30T00:24:47Z","timestamp":1745972687000},"page":"343-347","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":1,"title":["Urachal Villous Adenoma Coexistent With Urachal Carcinoma: A Case Report"],"prefix":"10.1002","volume":"8","author":[{"ORCID":"https:\/\/orcid.org\/0009-0008-8130-8803","authenticated-orcid":false,"given":"Shotaro","family":"Hatano","sequence":"first","affiliation":[{"name":"Department of Urology Osaka Red Cross Hospital  Osaka Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Yousuke","family":"Shimizu","sequence":"additional","affiliation":[{"name":"Department of Urology Osaka Red Cross Hospital  Osaka 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