title: [CT-colonography after incomplete conventional colonoscopy].
abstract: BACKGROUND
  CT-colonography (CTC) is recommended in the case of an incomplete conventional colonoscopy (CC). The present study was initiated to assess feasibility and outcomes in same-day CTC after incomplete CC.
  
  
  METHODS
  Out of 480 consecutive patients who had CC for symptoms or for surveillance, 50 were incomplete for reasons other than insufficient preparation. If possible, CTC was performed on the same day in dual positions without contrast. Where CTC found suspected polyps, patients had a re-CC for verification and removal, and subsequent surgery in the case of cancer.
  
  
  RESULTS
  Reasons for incomplete CC were loop formation (24%), pain (48%), kinking or external compression (24%) or benign strictures (4%). 43 of 50 CTCs (86%, 95% CI 73-94%) were conclusive. The organization allowed for 25 patients (50%) to have CTC on the same day. CTC detected 17 suspected polyps/masses, 13 of which were verified in 12 patients (28%). Re-CC or surgery verified 3 out of 4 of the suspected polyps < or = 5 mm, 5 out of 6 of those sized 6-9 mm, and 5 out of 7 of the masses > 9 mm (including 2 cancers). 19 (38%) had previously undetected extra-intestinal disease, including metastases in 4 patients, a uterine cancer in one, and a 7 cm abdominal aortic aneurism in one.
  
  
  CONCLUSIONS
  Same-day CTC after incomplete CC is feasible and effective.
authors.affiliation: Herlev Hospital, Gastroenheden, Kirurgisk Sektion D-113, Herlev.
authors.forename: Steffen
authors.initials: S
authors.lastname: Brisling
authors.forename: Sven
authors.initials: S
authors.lastname: Adamsen
authors.forename: Henrik
authors.initials: H
authors.lastname: Nørgaard
authors.forename: Lene
authors.initials: L
authors.lastname: Brink
authors.forename: Kirstine Lintrup
authors.initials: KL
authors.lastname: Hermann
authors.forename: Regnar Bøge
authors.initials: RB
authors.lastname: Arnesen
mesh_terms: D003108:Colonic Diseases / Q000000981:diagnostic imaging* / Q000473:pathology; D003111:Colonic Polyps / Q000000981:diagnostic imaging / Q000473:pathology; D023881:Colonography, Computed Tomographic / Q000379:methods; D003113:Colonoscopy / Q000009:adverse effects / Q000379:methods; D015179:Colorectal Neoplasms / Q000000981:diagnostic imaging / Q000473:pathology; D005260:Female; D006801:Humans; D008297:Male; D012680:Sensitivity and Specificity