title: The relationship between ureteral stone characteristics and secondary signs in renal colic.
abstract: OBJECTIVE
  To assess correlations between stone size/location and severity of secondary signs for ureteral obstruction.
  
  
  METHODS
  Unenhanced multi-detector computed tomography examinations of 150 patients with acute renal colic were reviewed. Stone size, location in the ureter, kidney size and Hounsfield unit values, perinephric edema, and degree of hydronephrosis were assessed.
  
  
  RESULTS
  Pale kidney sign was detected in 36%. Hydronephrosis was mild in 63% and severe in 21%; severe hydronephrosis was associated with larger stones. Mid-ureter and ureteropelvic junction stones were more likely to cause hydronephrosis. Perinephric edema (56%) was not correlated with stone size/location.
  
  
  CONCLUSIONS
  Only severe hydronephrosis was significantly associated with larger stone size.
authors.affiliation: Department of Radiology, Hadassah Mount Scopus, Hebrew University Medical Center, Jerusalem, Israel. hiller@netvision.net.il
authors.forename: Nurith
authors.initials: N
authors.lastname: Hiller
authors.forename: Nadav
authors.initials: N
authors.lastname: Berkovitz
authors.forename: Natalia
authors.initials: N
authors.lastname: Lubashevsky
authors.forename: Shaden
authors.initials: S
authors.lastname: Salaima
authors.forename: Natalia
authors.initials: N
authors.lastname: Simanovsky
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D006801:Humans; D006869:Hydronephrosis / Q000000981:diagnostic imaging* / Q000209:etiology*; D008875:Middle Aged; D056844:Renal Colic / Q000000981:diagnostic imaging* / Q000209:etiology*; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity; D014057:Tomography, X-Ray Computed / Q000379:methods*; D014514:Ureteral Calculi / Q000150:complications* / Q000000981:diagnostic imaging*; D055815:Young Adult