MRI findings and diagnosis of brain echinococcus
10.3760/cma.j.issn.1005-1201.2010.07.006
- VernacularTitle:脑包虫病的MRI表现及诊断
- Author:
Shayiti MIRIGULI
;
Wenxiao JIA
- Publication Type:Journal Article
- Keywords:
Echinocoecosis;
Magnetic regonance imaging
- From:
Chinese Journal of Radiology
2010;44(7):700-703
- CountryChina
- Language:Chinese
-
Abstract:
Objective To study the characteristic findings of brain echinococcosis on MRI. Methods The MRI findings of 18 patients with pathologically confirmed brain echinococcosis were retrospectively reviewed.Results Among the patients.there were 9 cases of cystic echinococcosis and 9 cases of alveolar echinococcosis.In cystic echinococeosis,MRI revealed homogeneously hypointensity on T1WI and hyperintensity on T2WI,while it showed low signal intensity inside the cysts on FLAJR and DWI. In 6 cases of cystic echinococcosis, no edema was detected surrounding the lesions,while edema resulting from cyst rupture was found in 3 cases.The cystic walls were visible in 6 csses, obscure in 3 cases.The ruptured hydatid cysts in 3 cases showed slight ring enhancement.Alveolar echinococcosis appeared as multiple lesions with isointensity on T1WI and hypointensity on T2WI,surrounded by vasogenic edema.The "charcoal-like"hypointensity and innumerous hyperintense bubbles of 1-10 mm in diameter inside the lesions on T2-weighted MR images were characteristic for lesions of alveolar echinococcosis.The lesions revealed hypointensity on DWI and showed irregular ring enhancement after injection of Gd-DTPA. Perfusion-weighted MR imaging revealed low relative cerebral blood volume.Conclusion MRI can demonstrate lesions of brain echinococcosis accurately due to its advantages of multiorientation and multiparameter.It is clinically valuable.
