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《Chinese Journal of Medical Imaging Technology》 2005-01
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MR diagnosis of WHO grade Ⅱ astrocytoma with diffuse infiltrating growth pattern

LI Tao, MA Lin *, LIANG Li(Department of Radiology, PLA General Hospital, Beijing 100853, China)  
Objective To investigate the MR imaging features of diffuse astrocytoma. Methods MR studies of 15 patients with pathologically confirmed grade Ⅱ diffuse astrocytomas were reviewed retrospectively. Results The tumors showed diffusely infiltrated isointensity or low signal on T1WI and high signal on T2WI in all 15 cases. Frontal lobe was involved in 9 cases, temporal lobe in 9 cases, parietal lobe in 8 cases, hippocampus in 5 cases, insular lobe in 5 cases, basal ganglion in 6 cases, thalamus in 5 cases, brain stem in 5 cases, and corpus callosum in 6 cases. Most lesions showed no enhancement after Gd DTPA administration, but nodular enhancement was seen in 5 cases. Conclusion MRI can clearly detect the extent and feature of the diffuse astrocytoma and should be the first modality of choice in showing the tumor spectrum, and it has significant clinical value in the diagnosis and differential diagnosis.
【CateGory Index】: R739.4
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