Value of conventional and functional MR in the diagnosis of orbital mucosa-associated lymphoid tissue lymphoma
10.3969/j.issn.1002-1671.2016.10.006
- VernacularTitle:常规及功能MR在眼眶原发黏膜相关淋巴组织淋巴瘤中的诊断价值
- Author:
Lei CHEN
;
Xiaoquan XU
;
Hao HU
;
Guoyi SU
;
Hu LIU
;
Feiyun WU
- Publication Type:Journal Article
- Keywords:
orbit;
mucosa-associated lymphoid tissue lymphoma;
magnetic resonance imaging
- From:
Journal of Practical Radiology
2016;32(10):1510-1512,1524
- CountryChina
- Language:Chinese
-
Abstract:
Objective To evaluate the role of conventional and functional MR in the diagnosis of orbital mucosa-associated lymphoid tissue lymphoma (MALToma).Methods Twenty-two patients with pathologically confirmed orbital MALToma were enrolled in our study.The number,location,morphology,involvement of surrounding structure and imaging features were evaluated.Apparent diffusion coefficient (ADC) values derived from diffusion weighted imaging and time-intensity curve (TIC)pattern derived from dynamic contrast enhanced MRI were assessed. Results Orbital MALToma occurred unilaterally in 1 7 cases and bilaterally in 5 cases.Anterior orbit preseptal region was involved most frequently (20 cases),followed by intraconal(19 cases),extraxonal (17 cases)and lacrimal fossa (12 cases)regions.Most cases showed as homogeneously iso-intensity on both T1 and T2 weighted images.Mean ADC value of the lesions was (0.61 ± 0.08)× 10 -3 mm2/s.A washout-type TIC pattern was observed in 1 5 cases,while plateau pattern was found in 7 cases.Conclusion Conventional MRI can assist in describing the extent,while the functional MRI can quantitatively reflect the histo-pathological features of orbital MALToma.Combination of conventional and functional MRI can help the diagnosis of orbital MALToma.
