title: Neither MRI, CT nor US is superior to diagnose tumors in the salivary glands--an extended case study.
abstract: OBJECTIVE
  Ultrasonography (US), computed tomography (CT) and magnetic resonance imaging (MRI) are the most common radiological procedures for the diagnosis of tumor-like lesions of the salivary glands. The aim of the present study was to determine whether MRI or CT provide additional information besides that delivered by US.
  
  
  METHODS
  109 patients with a tumor-like lesion of the salivary glands underwent surgery. MRI and CT were arranged in 73 and in 40 patients respectively, whereas all 109 patients were prospectively diagnosed by US. The results of CT, MRI and US were compared with the histological outcome. Furthermore, the recent rise in the number of CT and MRI studies was investigated.
  
  
  RESULTS
  On CT and MRI, there was no rise in the percentage of malignant tumors or advanced surgical procedures. In respect of the radiological assessment of the lesion (benign/malignant) and the correct diagnosis, CT, MRI and US were comparable in terms of sensitivity, specificity and accuracy. No significant difference was found in the Chi-square test (p > 0.05).
  
  
  CONCLUSIONS
  The evaluation of the preoperative results of CT, MRI and US revealed no advantage for CT or MRI; these procedures are only required in specific cases. An update or revision of the current preoperative diagnostic management is deemed necessary.
authors.affiliation: Department of Otorhinolaryngology, Head and Neck Surgery, University Hospital Münster, Germany. rudack@uni-muenster.de
authors.forename: Claudia
authors.initials: C
authors.lastname: Rudack
authors.forename: Sabine
authors.initials: S
authors.lastname: Jörg
authors.forename: Stephan
authors.initials: S
authors.lastname: Kloska
authors.forename: Wolfgang
authors.initials: W
authors.lastname: Stoll
authors.forename: Oliver
authors.initials: O
authors.lastname: Thiede
mesh_terms: D016009:Chi-Square Distribution; D005260:Female; D006801:Humans; D008279:Magnetic Resonance Imaging; D008297:Male; D008875:Middle Aged; D011446:Prospective Studies; D012468:Salivary Gland Neoplasms / Q000175:diagnosis* / Q000601:surgery; D012680:Sensitivity and Specificity; D014057:Tomography, X-Ray Computed; D014463:Ultrasonography