Abstract
BACKGROUND AND PURPOSE: 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.
MATERIALS AND 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.
Abbreviations
- CI
- contrast index
- ER
- enhancement ratio
- DCE
- dynamic contrast-enhanced
- SFT
- solitary fibrous tumor
- TIC
- time-intensity curve
Footnotes
Zhengyu Zhang and Jitong Shi shared equally in the authorship of this article and are co-first authors.
- © 2013 American Society of Neuroradiology
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