title: Dynamic evaluation of benign neoplasm of parotid glands with multidetector row CT.
abstract: OBJECTIVE
  The aim of this paper was to evaluate the role of net-enhancement (NE) of benign salivary glands with multiphase multidetector row CT (MDCT).
  
  
  METHODS
  Forty-eight patients (M=27, F=21), aged 35-76 years old (mean =57) with benign parotid neoplasms were examinated with 4 MDCT, at 20'', 40'', 70'' e 9' after intravenous administration of contrast medium. NE was calculated after subtracting precontrast phase to postcontrast phases. Final data were compared to the histopathology.
  
  
  RESULTS
  Thirty-six cases were pleomorphic adenomas (PA), 24 Warthin (WT). PA had a medium NE values of 23 HU, 74 HU, 53 HU e 34 HU at 20'', 40'', 70'' e 9' respectively. WT had a medium NE of 52 HU, 54 HU, 40 HU e 39 HU respectively at the same times. After subtracting precontrast phase to the delayed phase, with NE at 9' and cut-off of 34 HU, we have differenziate PA from WT and normal gland with specifity (SP) 87%, sensibility (SE) 60%, positive predictive value (PPV) and negative predictive value (NPV) of 75% and 59%; with NE at 20'' and cut-off of 54HU we have distingueshed WT from AP with SP 83%, SE 50%, PPV 75% and NPV 63%.
  
  
  CONCLUSIONS
  The study of NE can allow the characterization of benign parotid gland tumors.
authors.affiliation: Department of Internal Clinical and Experimental Medicine, Second Università of Naples, Naples, Italy. salvatore.cappabianca@unina2.it
authors.forename: S
authors.initials: S
authors.lastname: Cappabianca
authors.forename: R
authors.initials: R
authors.lastname: Capasso
authors.forename: M
authors.initials: M
authors.lastname: Cirillo
authors.forename: M
authors.initials: M
authors.lastname: Santagata
authors.forename: G
authors.initials: G
authors.lastname: Tartaro
authors.forename: G
authors.initials: G
authors.lastname: Colella
mesh_terms: D000235:Adenolymphoma / Q000000981:diagnostic imaging*; D008949:Adenoma, Pleomorphic / Q000000981:diagnostic imaging*; D000328:Adult; D000368:Aged; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D010307:Parotid Neoplasms / Q000000981:diagnostic imaging*; D012189:Retrospective Studies; D014057:Tomography, X-Ray Computed / Q000379:methods*