MRI diagnosis of solitary fibrous tumor in the orbit
10.3760/cma.j.issn.1005-1201.2012.03.007
- VernacularTitle:眼眶孤立性纤维瘤的MRI诊断
- Author:
Jiyong DONG
;
Bentao YANG
;
Wu ZHANG
;
Zhenchang WANG
;
Junfang XIAN
- Publication Type:Journal Article
- Keywords:
Orbital neoplasms;
Fibroma;
Magnetic resonance imaging
- From:
Chinese Journal of Radiology
2012;46(3):230-233
- CountryChina
- Language:Chinese
-
Abstract:
Objective To explore the MRI features of solitary fibrous tumor(SFT)in the orbit.Methods The MRI findings of 7 patients with SFT in the orbit confirmed by histopathology were analyzed retrospectively.Re sults Of the 7 lesions,5 occurred in the right orbit and 2 in the left orbit.Six lesions were located in the extraconal space near the lacrimal gland fossa,including 5 in the superomedial region and 1 in the inferolateral region.The other one was located in the retrobulbar intraconal space.The lesions with well-defined margin showed elliptic shape in 6 cases and lobulated configuration in 1.The maximum diameter of the lesions ranged from 18 to 40 mm(mean,31 mm).The lesions showed homogeneous isointense relative to gray matter on T1-weighted images in 6 patients.On T2-weighted images,the lesions showed heterogeneous hypointense in 5 patients,isointense and hyperintense in one patient respectively.SFT demonstrated markedly homogeneous enhancement in 6 patients and inhomogeneous enhancement in one patient The time-intensity curves(TIC)of 7 patients exhibited a rapidly enhancing and rapid washout pattern on dynamic contrast-enhanced(DCE)MRI.Conclusion Hypointense signal on T2WI,marked enhancement on contrast-enhanced T1 WI,and a rapidly enhancing and rapid washout pattern TIC on DCE MRI are the typical MRI features of orbital SFT.
