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Eight patients with bladder SCNEC and 80 with UC underwent CT and MRI, whereas the remaining two patients with SCNEC underwent CT alone before treatment. CT and MRI findings were retrospectively evaluated and compared between the two pathologies.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Results<\/jats:title>\n                    <jats:p>\n                      The maximum diameter (36.5\u00a0mm vs. 19.0\u00a0mm,\n                      <jats:italic>p<\/jats:italic>\n                      \u2009&lt;\u20090.01) and height (22.0\u00a0mm vs. 14.0\u00a0mm,\n                      <jats:italic>p<\/jats:italic>\n                      \u2009&lt;\u20090.01) of the tumor in bladder SCNEC were higher than in UC. The pedunculated configuration (20% vs. 61%,\n                      <jats:italic>p<\/jats:italic>\n                      \u2009&lt;\u20090.05) and irregular tumor margins (20% vs. 76%,\n                      <jats:italic>p<\/jats:italic>\n                      \u2009&lt;\u20090.01) in bladder SCNEC were less common than in UC. The CT attenuation of the solid component in unenhanced CT images was higher in bladder SCNEC than in UC (37 Hounsfield unit [HU] vs. 34 HU,\n                      <jats:italic>p<\/jats:italic>\n                      \u2009&lt;\u20090.01). The apparent diffusion coefficient (ADC) of the solid component in bladder SCNEC was lower than in UC (0.49\u2009\u00d7\u200910\n                      <jats:sup>\u22123<\/jats:sup>\n                      mm\n                      <jats:sup>2<\/jats:sup>\n                      \/s vs. 1.02\u2009\u00d7\u200910\n                      <jats:sup>\u22123<\/jats:sup>\n                      mm\n                      <jats:sup>2<\/jats:sup>\n                      \/s,\n                      <jats:italic>p<\/jats:italic>\n                      \u2009&lt;\u20090.01).\n                    <\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Conclusion<\/jats:title>\n                    <jats:p>In comparison with UC, bladder SCNEC was larger, had higher unenhanced CT attenuation, and had a lower ADC value. The pedunculated configuration and irregular tumor margins were typical of bladder UC.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Graphical abstract<\/jats:title>\n                  <\/jats:sec>","DOI":"10.1007\/s00261-024-04274-z","type":"journal-article","created":{"date-parts":[[2024,4,7]],"date-time":"2024-04-07T23:10:07Z","timestamp":1712531407000},"page":"2672-2682","update-policy":"https:\/\/doi.org\/10.1007\/springer_crossmark_policy","source":"Crossref","is-referenced-by-count":3,"title":["CT and MRI findings of small cell neuroendocrine carcinoma of the urinary bladder: comparison with urothelial carcinoma"],"prefix":"10.1007","volume":"49","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-2807-0524","authenticated-orcid":false,"given":"Masaya","family":"Kawaguchi","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Hiroki","family":"Kato","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Takuya","family":"Koie","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Yoshifumi","family":"Noda","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Fuminori","family":"Hyodo","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Tatsuhiko","family":"Miyazaki","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Masayuki","family":"Matsuo","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"297","published-online":{"date-parts":[[2024,4,8]]},"reference":[{"key":"4274_CR1","first-page":"389","volume-title":"WHO classification of urinary and male genital tumours","author":"R de Krijger","year":"2022","unstructured":"de Krijger R, Fine S, Lotan T, Ro J, Rubin M, Wei Q (2022) Small cell neuroendocrine carcnoma. 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