Head and Neck Imaging
The Value of Magnetic Resonance Imaging for Pilocytic Astrocytoma
Author：WANG Hui, GAO Ling
affiliation：Department of Radiology, Nanjing Traditional Chinese Medicine Hospital, Nanjing 210001, Jiangsu Province, China
PDFAbstract
Objective To investigate the value of magnetic resonance imaging (MRI) for pilocytic astrocytoma (PA). Methods 11 patients with PA proven by pathology were selected in study, and their pre-operation MRI findings were analyzed and summarized retrospectively. Results Tumor located at cerebellum (7 cases) and cerebral hemisphere (4 cases) among all the 11 cases and could be classified as cyst (2 cases), cyst with nodule (6 cases) and mass (3 cases). Mural nodule appeared in 4 cases. Furthermore, displacement of the fourth ventricle and dropsy of supratentorial ventricle appeared in 6 cases. The solid component of tumor appeared as hypointense or isointense on T1WI, hyperintense or isointense on T2WI and hypointense on DWI. After administration of Gd-DTPA intravenously, the solid part showed obvious enhancement while the cystic part appeared little. Conclusion There is characteristic appearance of PA in MRI that could be a used as preferential method for pre-operation diagnosis.
【Keyword】Pilocytic Astrocytoma; Magnetic Resonance Imaging; Diffusion Weighted Imaging
【Chart number】R739.41；R445.2
【Document Identification Number】A
【DOI】 10.3969/j.issn.1672- 5131.2017.10.006
Chinese journal of CT and MRI
th15Volume， th 10 Issue
2017Year10Month
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