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| Analysis of MRI manifestation and relatives pathology feature of supratentorial primitive neuroectodermal tumor in children |
| GUAN Hong-mei1, ZHAO Meng2, LI Xiao-hui1, GAO Xiu-cheng1, XI Yan-li1 |
1. Department of Radiology, Children’s Hospital of Nanjing Medical University, Nanjing 210008, China;
2. Department of Radiology, First Affiliated Hospital of Nanjing Medical University, Nanjing 210009, China |
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Abstract Objective: To investigate the MRI features of the supratentorial primitive neuroectodermal tumor(sPNET) in children. Methods: Twenty cases of sPNET confirmed by operation and pathology were collected, all patients underwent conventional MRI scan, enhanced scan, and diffusion-weighted imaging(DWI) scan. Results: Twenty cases of sPNET were all located in supratentorial cerebral hemisphere(frontal, temporal, top, occipital, insular lobe, lateral ventricle). Fourteen cases were shown huge cystic-solid mixed masses, 4 cases were manifestated great solid tumor with microcystic, 2 cases were small tumor size and calcification. No edema or peritumoral edema around the tumor, hemorrhage in 5 cases, 3 cases of postoperative examination spreaded along the subarachnoid. MR scan was shown mixed signal, the solid part of tumor was shown equal or slightly low signal on T1WI, equal or slightly hyperintense on T2WI, high signal on DWI, and slightly low signal on ADC map. The signal of cystic region was consistent with cerebrospinal fluid and the region of cyst with hemorrhage was shown complex signal. The solid part of the tumor was enhanced moderately or markedly. Conclusion: There were some imaging features with sPENT. DWI was especially beneficial to nature of tumor diagnosis, providing information of tumor invasion and whether implantation metastasis along the subarachnoid existed. It was beneficial to clinical staging and treatment plan.
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Received: 01 July 2016
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