title: Diagnostic yield of barium enema examination after incomplete colonoscopy.
abstract: OBJECTIVE
  To determine the diagnostic yield of barium enema examination for neoplastic lesions larger than 1 cm in diameter in the nonvisualized portion of the colon after incomplete colonoscopy.
  
  
  METHODS
  A review of computerized gastroenterology and radiology databases identified 355 patients who underwent incomplete colonoscopy; 158 (44.5%) underwent subsequent barium enema examination (125 double-contrast and 33 single-contrast barium enema examinations). The radiographic reports were reviewed and compared with the endoscopic reports by one author to identify neoplastic lesions larger than 1 cm in the nonvisualized colon after incomplete colonoscopy. Six such lesions were found. In all six cases, the images from the barium enema examinations were reviewed together by two authors to determine the size, location, and morphologic features (polypoid, ulcerated, or annular) of the lesions. Medical, endoscopic, and surgical records were subsequently reviewed by one author to determine whether these represented true- or false-positive radiographic findings.
  
  
  RESULTS
  Barium enema examination depicted six possible lesions in the nonvisualized colon after incomplete colonoscopy; five were found to be true-positive radiographic findings, and one was found to be a false-positive finding. The five true-positive findings included two annular lesions (both adenocarcinomas) and three polypoid lesions (all tubulovillous adenomas, with high-grade dysplasia in one). Thus, neoplastic lesions larger than 1 cm were found on barium enema images in the nonvisualized colon in five (3.2%) of 158 patients after incomplete colonoscopy.
  
  
  CONCLUSIONS
  Barium enema examination had a diagnostic yield of 3.2% for neoplastic lesions larger than 1 cm in the nonvisualized colon after incomplete colonoscopy.
authors.affiliation: Department of Radiology, Hospital of the University of Pennsylvania, 3400 Spruce St, Philadelphia, PA 19104, USA.
authors.forename: Alice
authors.initials: A
authors.lastname: Chong
authors.forename: Janak N
authors.initials: JN
authors.lastname: Shah
authors.forename: Marc S
authors.initials: MS
authors.lastname: Levine
authors.forename: Stephen E
authors.initials: SE
authors.lastname: Rubesin
authors.forename: Igor
authors.initials: I
authors.lastname: Laufer
authors.forename: Gregory G
authors.initials: GG
authors.lastname: Ginsberg
authors.forename: William B
authors.initials: WB
authors.lastname: Long
authors.forename: Michael L
authors.initials: ML
authors.lastname: Kochman
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D001466:Barium Sulfate; D003110:Colonic Neoplasms / Q000000981:diagnostic imaging* / Q000601:surgery; D003113:Colonoscopy; D003937:Diagnosis, Differential; D004733:Enema; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D011237:Predictive Value of Tests; D011859:Radiography; D012189:Retrospective Studies
chemical_list: D001466:Barium Sulfate