Value of conventional and functional MRI in the diagnosis of orbit solitary fibrous tumor
10.3969/j.issn.1002-1671.2018.01.007
- VernacularTitle:常规及功能MRI对眼眶孤立性纤维瘤的诊断价值
- Author:
Jiliang REN
1
;
Ying YUAN
;
Yingwei WU
;
Xiaofeng TAO
Author Information
1. 上海交通大学医学院附属第九人民医院放射科
- Keywords:
orbit;
solitary fibrous tumor;
magnetic resonance imaging
- From:
Journal of Practical Radiology
2018;34(1):23-26
- CountryChina
- Language:Chinese
-
Abstract:
Objective To evaluate the value of conventional and functional MRI in the diagnosis of orbital solitary fibrous tumor (SFT).Methods MR images of 8 patients with pathologically confirmed orbital SFT were analyzed retrospectively.The lesion shape, size,location and signal features on conventional MRI were evaluated.Apparent diffusion coefficient(ADC)values and DCE-MRI parameters(time-signal intensity curve pattern,maximum ratio of enhancement and washout ratio)were calculated.Results The majority of tumors(6/8)showed regular shape with maximum diameters varying from 2.5 cm to 3.7 cm.Of 8 cases,there was 1 case in intraconal space,2 cases involved with intra and extraconal space,5 cases in extraconal space.On T1WI,all lesions demonstrated isointense to gray matter.On T2WI,5 lesions showed isointensity and 3 lesions showed slight hypointensity,of which 6 cases showed heterogeneous signal.After contrast enhancement,8 lesions showed marked enhancement.Plateau pattern of time-signal intensity curve was observed in 6 cases with maximum ratio of enhancement of 1.37 ± 0.54 and washout ratio of 6.58% ± 3.66%.Mean ADC value was(1.28 ± 0.25)×10-3mm2/s.Conclusion Combination of conventional MRI,DWI and DCE-MRI can assist the diagnosis of orbital SFT.
