title: Carotid artery invasion by head and neck masses: prediction with MR imaging.
abstract: OBJECTIVE
  To determine the value of magnetic resonance (MR) imaging in predicting resectability of head and neck neoplasms around the carotid arteries.
  
  
  METHODS
  Forty-nine patients (28 male patients and 21 female patients aged 17-79 years; mean, 57.3 years) with head and neck masses and clinical evidence of carotid wall invasion underwent MR imaging. T1-weighted, T2-weighted, and gadolinium-enhanced T1-weighted images were analyzed to determine circumferential involvement of 53 arteries by tumor.
  
  
  RESULTS
  More than 270 degrees of circumferential involvement was considered suggestive of unresectability of the malignant neoplasm; 270 degrees or less was considered lack of invasion. The sensitivity of MR imaging for determination of unresectable disease was 100% (12 of 12 cases), specificity was 88% (36 of 41), and accuracy was 91% (48 of 53). Accuracy was 100% for squamous cell carcinoma (n = 29).
  
  
  CONCLUSIONS
  Tumor that encompasses more than 270 degrees of the carotid artery probably cannot be removed from the artery. Tumor that involves 270 degrees or less of the artery can be removed.
authors.affiliation: Department of Radiology, Hospital of the University of Pennsylvania, Philadelphia 19104, USA.
authors.forename: D M
authors.initials: DM
authors.lastname: Yousem
authors.forename: H
authors.initials: H
authors.lastname: Hatabu
authors.forename: R W
authors.initials: RW
authors.lastname: Hurst
authors.forename: H M
authors.initials: HM
authors.lastname: Seigerman
authors.forename: K T
authors.initials: KT
authors.lastname: Montone
authors.forename: G S
authors.initials: GS
authors.lastname: Weinstein
authors.forename: R E
authors.initials: RE
authors.lastname: Hayden
authors.forename: A N
authors.initials: AN
authors.lastname: Goldberg
authors.forename: D C
authors.initials: DC
authors.lastname: Bigelow
authors.forename: M J
authors.initials: MJ
authors.lastname: Kotapka
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D002339:Carotid Arteries / Q000473:pathology*; D005260:Female; D006258:Head and Neck Neoplasms / Q000175:diagnosis / Q000473:pathology* / Q000601:surgery; D006801:Humans; D008279:Magnetic Resonance Imaging; D008297:Male; D008875:Middle Aged; D009361:Neoplasm Invasiveness; D012680:Sensitivity and Specificity