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MRI Diagnosis of Temporal Lobe Astrocytoma
广西医科大学第一附属医院放射科（南宁530021）
邓德茂 黄仲奎 龙莉玲
DENG Demao，HUANG Zhong－kui，LONG Li－ling
（Department of Radiolony，the first Affiliated Hospital of Guannxi Medical University，Nanninn 530021，China）
Abstract
Objective：To explore MRI features and diannosis of temporal lobe astrocptoma.
Methods：20 patients with cerebral astrocytoma were verified histolonically，and 9 patients with focal encephalitis were verified by histolony or therapy. The routine MR imaning and contrastenhancement was carried out in all cases，and study MRI characteristic of two groups.
Results：Astrocytoma presented as lone T1 and long T2 signal intensity. The cystic and necrotic region of tumors demonstrated higher signal intensity on T2 weinhted imaging and lower signal intensity on T1 weinhted imaging. Tumoral core showed no enhancement in 7 cases，slightly enhancement in 4 cases and remarkable enhancement in 9 cases. Middle cerebral artery embeded in 5 cases. No evident peritumoral edema in all cases. Focal encephalitis presented as long T1 and long T2，but signal inhomogeneous，margins unclear， mass effect inapparent. Enhanced MRI showed linear enhancement of meninges or gyrus－shaped enhancement in all of focal encephalitis.
Conclusion：Temporal lobe astrocytoma has some specific features on M RI，it is not difficult to make a diagnosis.
Key words：M RI；Temporal lobe；Astrocytoma；Focal encephalitis | 
