title: [Possibilities and limitations of spiral-CT in the study of cancer of the kidney pelvis].
abstract: OBJECTIVE
  To assess the value of spiral CT in comparison to conventional CT in the staging of renal pelvic carcinoma.
  
  
  METHODS
  35 patients with renal pelvic carcinoma underwent preoperative CT; conventional technique (n = 21) and spiral CT (n = 14) with the reconstruction of thin sections were compared.
  
  
  RESULTS
  Non-invasive or minimal invasive tumours (TA, T1, T2) could not be differentiated with either technique. Small, flat tumours (TA) or multicentric tumours may be missed, even if spiral scanning is applied. The separation of local tumour growth from infiltration is significantly improved by spiral CT (12 of 12 patients instead of 18 out of 21 patients with the conventional technique). Tumour size was more accurately measured by spiral CT (correct estimation in 9 of 12 cases compared to 12 of 21) without being significant.
  
  
  CONCLUSIONS
  Spiral CT with the simultaneous reconstruction of thin sections results in an improved staging of renal pelvic carcinoma. Malignancy, however, cannot be excluded reliably.
authors.affiliation: Klinik für Radiologie, Johannes-Gutenberg-Universität, Mainz.
authors.forename: H U
authors.initials: HU
authors.lastname: Kauczor
authors.forename: H C
authors.initials: HC
authors.lastname: Schwickert
authors.forename: P
authors.initials: P
authors.lastname: Albers
authors.forename: G
authors.initials: G
authors.lastname: Voges
authors.forename: F
authors.initials: F
authors.lastname: Schweden
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D002295:Carcinoma, Transitional Cell / Q000000981:diagnostic imaging*; D005260:Female; D006801:Humans; D007680:Kidney Neoplasms / Q000000981:diagnostic imaging*; D007682:Kidney Pelvis; D008297:Male; D008875:Middle Aged; D014057:Tomography, X-Ray Computed
vernacular_title: Möglichkeiten und Grenzen der Spiral-CT bei der Untersuchung von Nierenbeckenkarzinomen.