{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,4,24]],"date-time":"2026-04-24T13:46:13Z","timestamp":1777038373145,"version":"3.51.4"},"reference-count":14,"publisher":"Wiley","issue":"2","license":[{"start":{"date-parts":[[2021,12,2]],"date-time":"2021-12-02T00:00:00Z","timestamp":1638403200000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/creativecommons.org\/licenses\/by-nc-nd\/4.0\/"}],"content-domain":{"domain":["onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["IJU Case Reports"],"published-print":{"date-parts":[[2022,3]]},"abstract":"<jats:sec><jats:title>Introduction<\/jats:title><jats:p>Urothelial neoplasms with a varus growth pattern are rare, and few urologists have encountered inverted urothelial carcinoma of the ureter.<\/jats:p><\/jats:sec><jats:sec><jats:title>Case presentation<\/jats:title><jats:p>An 82\u2010year\u2010old man was referred to our hospital for investigation of gross hematuria. Magnetic resonance imaging revealed nodules measuring 1\u20132\u2009mm in diameter in the left upper ureter with slight reduction in signal intensity on diffusion\u2010weighted imaging. Ureteroscopy showed a pedunculated smooth tumor that had the appearance of an inverted papilloma rather than the papillary shape typical of urothelial carcinoma. The tumor was biopsied and histopathological examination revealed a noninvasive, low\u2010grade urothelial carcinoma with inverted multiple layers. Laparoscopic radical nephroureterectomy was subsequently performed, and a pedunculated tumor measuring 20\u2009mm in diameter was found in the left upper ureter. The histopathological diagnosis was inverted papillary urothelial carcinoma, low\u2010grade, pTa, pN0.<\/jats:p><\/jats:sec><jats:sec><jats:title>Conclusion<\/jats:title><jats:p>This report provides the first clinical description of inverted papillary urothelial carcinoma of the ureter.<\/jats:p><\/jats:sec>","DOI":"10.1002\/iju5.12403","type":"journal-article","created":{"date-parts":[[2021,12,2]],"date-time":"2021-12-02T10:50:09Z","timestamp":1638442209000},"page":"95-98","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":1,"title":["Case of inverted papillary urothelial carcinoma in the ureter"],"prefix":"10.1002","volume":"5","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-6731-9388","authenticated-orcid":false,"given":"Takuma","family":"Nirei","sequence":"first","affiliation":[{"name":"Department of Urology Yokohama City University Hospital Yokohama Japan"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Noboru","family":"Nakaigawa","sequence":"additional","affiliation":[{"name":"Department of Urology Yokohama City University Hospital Yokohama Japan"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Mai","family":"Matsumura","sequence":"additional","affiliation":[{"name":"Department of Pathology Yokohama City University Hospital Yokohama Japan"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Toshiaki","family":"Kataoka","sequence":"additional","affiliation":[{"name":"Department of Pathology Yokohama City University Hospital Yokohama Japan"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Takahiro","family":"Nagasaka","sequence":"additional","affiliation":[{"name":"Department of Urology Yokohama City University Hospital Yokohama Japan"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Kota","family":"Aomori","sequence":"additional","affiliation":[{"name":"Department of Urology Yokohama City University Hospital Yokohama Japan"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Yusuke","family":"Ito","sequence":"additional","affiliation":[{"name":"Department of Urology Yokohama City University Hospital Yokohama Japan"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Kentaro","family":"Muraoka","sequence":"additional","affiliation":[{"name":"Department of Urology Yokohama City University Hospital Yokohama Japan"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Masahiro","family":"Yao","sequence":"additional","affiliation":[{"name":"Department of Urology Yokohama City University Hospital Yokohama Japan"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"311","published-online":{"date-parts":[[2021,12,2]]},"reference":[{"key":"e_1_2_13_2_1","doi-asserted-by":"publisher","DOI":"10.1016\/S1078-1439(03)00139-X"},{"key":"e_1_2_13_3_1","doi-asserted-by":"publisher","DOI":"10.1177\/106689690501300203"},{"key":"e_1_2_13_4_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.eururo.2016.02.028"},{"key":"e_1_2_13_5_1","doi-asserted-by":"publisher","DOI":"10.1038\/modpathol.2014.158"},{"key":"e_1_2_13_6_1","doi-asserted-by":"publisher","DOI":"10.1097\/00000478-199709000-00010"},{"key":"e_1_2_13_7_1","first-page":"766","article-title":"Inverted variant of urothelial carcinoma of the urinary bladder: A report of three cases and a proposal for a new clinicopathologic entity","volume":"6","author":"Terada T","year":"2013","journal-title":"Int. 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