RT Journal Article SR Electronic T1 Imaging Characteristics of Schwannoma of the Cervical Sympathetic Chain: A Review of 12 Cases JF American Journal of Neuroradiology JO Am. J. Neuroradiol. FD American Society of Neuroradiology SP 1408 OP 1412 DO 10.3174/ajnr.A2212 VO 31 IS 8 A1 G. Anil A1 T.Y. Tan YR 2010 UL http://www.ajnr.org/content/31/8/1408.abstract AB BACKGROUND AND PURPOSE: SCSCs are rare. This study reviews our experience with CT and MR imaging of SCSCs. MATERIALS AND METHODS: We retrospectively reviewed the CT and MR imaging studies as well as clinical data of 12 patients (6 men, 6 women; mean age, 41 years; range, 27–55 years) with surgicopathologic evidence of SCSC, referred to our institution between January 1999 to October 2008. Images were evaluated with respect to the location, number, morphology, attenuation/signal intensity, enhancement characteristics, and patterns of mass effect of the schwannomas. RESULTS: The schwannomas were solitary, well-circumscribed, and medial to the carotid sheath. Seven were hypoattenuated to skeletal muscle on CT with poor postcontrast enhancement, 4 were isoattenuated, and a single lesion showed intense heterogeneous enhancement. At MR imaging, they were heterogeneously bright on T2WI with intense inhomogeneous postgadolinium enhancement. The ICA was displaced anteriorly in 9 patients with a component of lateral displacement in 8 of these patients. The ICA was in a neutral position in 2 patients and posterolaterally displaced in 1 patient. A single patient demonstrated separation of the ICA and IJV. There was splaying of the carotid bifurcation in 4 patients. CONCLUSIONS: We present the patterns of mass effect and the spectrum of CT and MR imaging characteristics of SCSC, including certain observations that are infrequently described in the published literature. ECAexternal carotid arteryICAinternal carotid arteryIJVinternal jugular veinSschwannomaSCSCschwannoma of the cervical sympathetic chainT1WIT1-weighted imagingT2WIT2-weighted imaging