title: [Spiral computerized tomography without perfusion of contrast media as first line investigation in patients with renal colic].
abstract: BACKGROUND
  We investigated the diagnostic accuracy of unenhanced helical CT in the detection of stones in patients with suspected renal colic from ureteral stones and compared CT findings with the results of plain abdominal film and US.
  
  
  METHODS
  We reviewed the findings relative to 80 patients (age range 24-75) who came to our observation to the Emergency Department with acute flank pain. All patients had been examined with plain abdominal radiography, US and unenhanced helical CT.
  
  
  RESULTS
  While abdominal radiography showed the presence of radiopaque stones in 38 patients only (47.5%), US demonstrated ureter dilatation in 72 patients and detected stones in 36 of them (45%). Helical CT performed best, depicting a stone in 72 patients (90%), with high sensitivity and specificity. Mean stone size was 3 mm, with 7 mm-1 mm range. The biggest stones were seen in 3 cases and the smallest ones in 34. In 8 patients with no signs of stones we found other extraurinary conditions, namely pancreatitis, diverticula, renal cancer. We also found a case of urinary tract infection.
  
  
  CONCLUSIONS
  Thanks to its short execution time and accuracy, helical CT makes the examination of choice in patients with acute flank pain due to renal colic. It is also a most valuable tool in the differential diagnosis of other pathological causes of pain such as abdominal or pelvic masses and inflammatory conditions.
authors.affiliation: Secondo Dipartimento di Radiologia, Ospedale S. Martino. stefromano@libero.it
authors.forename: S
authors.initials: S
authors.lastname: Romano
authors.forename: G A
authors.initials: GA
authors.lastname: Rollandi
authors.forename: M
authors.initials: M
authors.lastname: Scaglione
authors.forename: E
authors.initials: E
authors.lastname: Biscaldi
authors.forename: S
authors.initials: S
authors.lastname: Cantoni
authors.forename: F
authors.initials: F
authors.lastname: Rebaudi
authors.forename: A
authors.initials: A
authors.lastname: Del Vecchio
authors.forename: R
authors.initials: R
authors.lastname: Grassi
mesh_terms: D000328:Adult; D000368:Aged; D003085:Colic / Q000000981:diagnostic imaging* / Q000209:etiology; D004630:Emergencies; D006801:Humans; D007674:Kidney Diseases / Q000000981:diagnostic imaging* / Q000209:etiology; D008875:Middle Aged; D012680:Sensitivity and Specificity; D014057:Tomography, X-Ray Computed / Q000379:methods*; D014514:Ureteral Calculi / Q000150:complications / Q000000981:diagnostic imaging*; D014517:Ureteral Obstruction / Q000150:complications / Q000000981:diagnostic imaging