| 李杰,袁梦媛,庞炳昕,王军梅,李卓,孙胜军.青少年多形性低级别神经上皮肿瘤CT及MRI表现[J].中国医学影像技术,2025,41(4):578~582 |
| 青少年多形性低级别神经上皮肿瘤CT及MRI表现 |
| CT and MRI manifestations of polymorphous low-grade neuroepithelial tumor of the young |
| 投稿时间：2024-10-16 修订日期：2025-02-21 |
| DOI：10.13929/j.issn.1003-3289.2025.04.015 |
| 中文关键词: 肿瘤,神经上皮 磁共振成像 体层摄影术,X线计算机 |
| 英文关键词:neoplasms, neuroepithelial magnetic resonance imaging tomography, X-ray computed |
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| 中文摘要: |
| 目的 观察青少年多形性低级别神经上皮肿瘤(PLNTY)CT及MRI表现。方法 回顾性分析21例病理证实的PLNTY,观察病灶CT及MRI表现。结果 21例PLNTY均为幕上单发,包括13例脑实质孤立型、6例脑实质弥漫型及2例脑实质外型;弥散加权成像(DWI)中病灶均无弥散受限,少数伴轻度瘤周水肿。13例脑实质孤立型PLNTY中,7例表现为钙化结节、5例为囊性病变、1例为实性结节;增强后11例病灶无强化、2例局部轻度强化。6例脑实质弥漫型PLNTY均表现为病变区皮层弥漫性增厚,其中4例合并皮层下白质异常信号;增强后4例病灶无强化、2例局部轻度强化。2例脑实质外型PLNTY均表现为实性肿块伴钙化,CT呈等密度,增强MRI显示局部轻度强化。结论 PLNTY的CT及MRI表现均有一定特征性。 |
| 英文摘要: |
| Objective To observe CT and MRI manifestations of polymorphous low-grade neuroepithelial tumor of the young (PLNTY). Methods Totally 21 cases of PLNTY confirmed by pathology were retrospectively enrolled, and CT and MRI manifestations of the lesions were observed. Results Single supratentorial tumor was found in all 21 cases, including 13 cases of isolated brain parenchymal type, 6 cases of diffuse brain parenchymal type and 2 cases of extra parenchymal type PLNTY. Diffusion weighted imaging (DWI) showed no diffusion limitation in all 21 cases, and a few cases with mild peritumoral edema. Among 13 cases of isolated brain parenchymal PLNTY, 7 cases presented as calcified nodules, 5 cases presented as cystic lesions and 1 case as solid nodule. After administration of contrast agents, no enhancement was found in 11 cases, while mild local enhancement was observed in 2 cases. Six cases of diffuse brain parenchymal PLNTY presented as diffuse thickening of the cortex in lesion area, with abnormal signals in the subcortical white matter in 4 cases. After administration of contrast agents, no enhancement was found in 4 cases, while mild local enhancement was noticed in 2 cases. Two cases of extra parenchymal PLNTY presented as solid mass with calcification, with equal density on CT and mild local enhancement on enhanced MRI. Conclusion CT and MRI manifestations of PLNTY had certain characteristics. |
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