{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,10,31]],"date-time":"2025-10-31T07:31:50Z","timestamp":1761895910719,"version":"3.40.3"},"reference-count":30,"publisher":"Wiley","issue":"11","license":[{"start":{"date-parts":[[2014,10,27]],"date-time":"2014-10-27T00:00:00Z","timestamp":1414368000000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"content-domain":{"domain":["onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["Colorectal Disease"],"published-print":{"date-parts":[[2014,11]]},"abstract":"<jats:title>Abstract<\/jats:title><jats:sec><jats:title>Aim<\/jats:title><jats:p>Accurate preoperative discrimination between extra\u2010 and intraperitoneal rectal cancer has important treatment implications. Our main objective was to compare the diagnostic performance of <jats:styled-content style=\"fixed-case\">MRI<\/jats:styled-content> with rigid rectoscopy (<jats:styled-content style=\"fixed-case\">RRS<\/jats:styled-content>) in assessing the location of rectal cancers above or below the peritoneal reflection (<jats:styled-content style=\"fixed-case\">PR<\/jats:styled-content>), using the findings obtained during abdominal surgery for treatment of the cancer as the reference standard. We also compared the accuracy of <jats:styled-content style=\"fixed-case\">MRI<\/jats:styled-content> and <jats:styled-content style=\"fixed-case\">RRS<\/jats:styled-content> in assessing the level of the lower border of the tumour from the anal verge.<\/jats:p><\/jats:sec><jats:sec><jats:title>Method<\/jats:title><jats:p>Patients with rectal carcinoma awaiting surgery underwent <jats:styled-content style=\"fixed-case\">MRI<\/jats:styled-content> and <jats:styled-content style=\"fixed-case\">RRS<\/jats:styled-content>. The <jats:styled-content style=\"fixed-case\">MRI<\/jats:styled-content> images were reviewed by two abdominal radiologists who determined the location of the inferior border of the tumour in relation to the <jats:styled-content style=\"fixed-case\">PR<\/jats:styled-content>. Receiver\u2013operating characteristics (<jats:styled-content style=\"fixed-case\">ROC<\/jats:styled-content>) curve analysis was performed to determine the diagnostic performance of <jats:styled-content style=\"fixed-case\">RRS<\/jats:styled-content> at different cut\u2010off values.<\/jats:p><\/jats:sec><jats:sec><jats:title>Results<\/jats:title><jats:p>The sensitivity and specificity were 98.15% and 100%, respectively, for MRI, and 100% and 76.92%, respectively, for RRS at a cut\u2010off value of &lt;\u00a010 cm. The mean level of the lower border of the tumour from the anal verge was 68\u00a0\u00b1\u00a044.3\u00a0mm on <jats:styled-content style=\"fixed-case\">RRS<\/jats:styled-content> and 73.5\u00a0\u00b1\u00a042.4\u00a0mm on <jats:styled-content style=\"fixed-case\">MRI<\/jats:styled-content> (<jats:italic>P\u00a0<\/jats:italic>=<jats:italic>\u00a0<\/jats:italic>0.25), with a trend towards overestimation with <jats:styled-content style=\"fixed-case\">MRI<\/jats:styled-content>.<\/jats:p><\/jats:sec><jats:sec><jats:title>Conclusion<\/jats:title><jats:p><jats:styled-content style=\"fixed-case\">RRS<\/jats:styled-content> is still the main means of assessing the level of a rectal tumour from the anal verge, but <jats:styled-content style=\"fixed-case\">MRI<\/jats:styled-content> has value in determining the level of the tumour in relation to the <jats:styled-content style=\"fixed-case\">PR<\/jats:styled-content>, which cannot be seen on endoscopy.<\/jats:p><\/jats:sec>","DOI":"10.1111\/codi.12698","type":"journal-article","created":{"date-parts":[[2014,6,28]],"date-time":"2014-06-28T15:25:16Z","timestamp":1403969116000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":18,"title":["Comparison between magnetic resonance imaging and rigid rectoscopy in the preoperative identification of intra\u2010 and extraperitoneal rectal cancer"],"prefix":"10.1111","volume":"16","author":[{"given":"F.","family":"Paparo","sequence":"first","affiliation":[{"name":"Department of Radiology E.O. 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