Imaging features of oligodendroglioma in cerebellar hemispheres / 实用放射学杂志

ABSTRACT

Objective To improve the diagnosis of oligodendroglioma(OD)in cerebellar hemispheres and discuss MRI features. Methods Clinical and imaging data of 7 cases with OD in cerebellar hemispheres were analyzed retrospectively,which were confirmed by surgery and pathology.Results In 7 patients,4 patients were OD,and 3 patients were anaplastic oligodendroglioma(AOD).MRI showed hypointense on T1WI and vividly hyperintense or mixed hyperintense on T2WI.The time intensity curve(TIC)manifested rise slowly;DWI(b=1 000 s/mm2) showed homogeneously hypointense or iso-hypointense.The ratios of OD and AOD were 1.753±0.784,1.660±0.551 respectively;Magnetic resonance spectroscopy(MRS)of oligodendrogliomas revealed a increased choline(Cho)and reduced N-acetylaspartate(NAA)without lactate(Lac)peak.Conclusion MRI manifestation of OD in cerebellar hemispheres has certain characteristicsthe boundary of lesion is unclear, irregular in shape,easy to cystic and necrotic,with or without peripheral edema of the tumor,delayed enhancement,higher in Cho peak,lower in NAA peak and lacking in Lac peak.