The clinical and MR features of intracranial nonspecific inflammatory granuloma / 实用放射学杂志

ABSTRACT

Objective To analyze the clinical and MR features of intracranial nonspecific inflammatory granuloma and improve the accuracy of preoperative diagnosis.Methods The clinical and MR features of 9 intracranial nonspecific inflammatory granuloma cases proved by histopathology were analyzed retrospectively.Results Nine lesions were all located in the supratentorial cerebral hemisphere with large lesion range and obvious peripheral edema.On enhancement MR imaging,the lesions were obviously and irregularly enhanced.There were simple patchy enhancement in 3 cases,patchy enhancement with multiple micronodular enhancement in 4 cases,and multiple micronodular enhancement in 2 cases.None enhancement areas were noticed in all enhancement lesions.There were superficial meningeal enhancements in 4 cases.On MR plain scanning,the MR enhancement area of lesions showed similar signal to the grey matter on T1 WI and low signal similarly to the white matter on T2 WI.On MRS scan,the significant high signal of Cho was detected in 2 cases and their Cho/Cr ratio was over 4.The Cho/Cr ratio was lower than 1.3 in 5 cases.Conclusion There are some specific MR enhancement features in the intracranial nonspecific inflammatory granuloma including multiple small nodules or patchy enhancement,in which there were no enhancement areas,and some cases have meningeal enhancement.