title: Value of MR imaging in differentiation between solitary fibrous tumor and schwannoma in the orbit.
abstract: OBJECTIVE
  Orbital SFT is a rare tumor, often misdiagnosed as orbital schwannoma preoperatively but with different prognosis and treatment. Our aim was to evaluate MR imaging features that might distinguish orbital SFT from schwannoma.
  
  
  METHODS
  MR imaging including DCE scanning was performed in 9 patients with SFT and 22 patients with schwannoma in the orbit confirmed by pathology. Location, shape, margin, signal intensity, homogeneity, enhancement pattern, ER, and TIC of the tumors were retrospectively evaluated.
  
  
  RESULTS
  There was a statistically significant difference between SFT and schwannoma in location and T2 signal intensity (P < .05). A statistically significant difference was also found regarding the enhancement pattern of the very high-signal-intensity areas shown on T2-weighted imaging and the type of TICs (P < .01).
  
  
  CONCLUSIONS
  MR imaging is useful in differentiating orbital SFT and schwannoma. The enhancement pattern of the very high-signal-intensity areas shown on T2-weighted imaging and the type of TICs on DCE MR imaging played an important role in differentiating orbital SFT from schwannoma.
authors.affiliation: Department of Radiology, Beijing Tongren Hospital, Capital Medical University, Beijing, China.
authors.forename: Z
authors.initials: Z
authors.lastname: Zhang
authors.forename: J
authors.initials: J
authors.lastname: Shi
authors.forename: J
authors.initials: J
authors.lastname: Guo
authors.forename: F
authors.initials: F
authors.lastname: Yan
authors.forename: L
authors.initials: L
authors.lastname: Fu
authors.forename: J
authors.initials: J
authors.lastname: Xian
mesh_terms: D000328:Adult; D000368:Aged; D003937:Diagnosis, Differential; D005260:Female; D006801:Humans; D008279:Magnetic Resonance Imaging / Q000379:methods*; D008297:Male; D008875:Middle Aged; D009442:Neurilemmoma / Q000473:pathology*; D009918:Orbital Neoplasms / Q000473:pathology*; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity; D054364:Solitary Fibrous Tumors / Q000473:pathology*