title: Staging of rectal carcinoma: prospective comparison of endorectal US and CT.
abstract: One hundred two consecutive patients undergoing surgical treatment for rectal cancer were examined by means of endorectal ultrasound (US) for staging before surgery. Eighty-one of these patients also underwent staging with computed tomography (CT). The diagnostic sensitivity of endorectal US in detection of tumor extension into fat was 67%; specificity, 77%; positive predictive value, 73%; and negative predictive value, 72%. The sensitivity of CT for this finding was 53%; specificity, 53%; positive predictive value, 56%; and negative predictive value, 50%. The sensitivity of endorectal US in detection of lymph node infiltration was 50%; specificity, 92%; positive predictive value, 68%; and negative predictive value, 84%. For this finding the sensitivity and negative predictive value, 76%. These findings suggest that endorectal US may be as accurate as CT, or more so, in the preoperative staging of rectal cancer.
authors.affiliation: Department of Radiology, Thomas Jefferson University Hospital, Philadelphia, PA 19107.
authors.forename: M D
authors.initials: MD
authors.lastname: Rifkin
authors.forename: S M
authors.initials: SM
authors.lastname: Ehrlich
authors.forename: G
authors.initials: G
authors.lastname: Marks
mesh_terms: D000273:Adipose Tissue / Q000473:pathology; D005260:Female; D006801:Humans; D008207:Lymphatic Metastasis / Q000175:diagnosis / Q000000981:diagnostic imaging; D008297:Male; D008875:Middle Aged; D009367:Neoplasm Staging; D011237:Predictive Value of Tests; D011446:Prospective Studies; D012004:Rectal Neoplasms / Q000175:diagnosis* / Q000000981:diagnostic imaging / Q000473:pathology; D012680:Sensitivity and Specificity; D014057:Tomography, X-Ray Computed; D014463:Ultrasonography