马尾终丝区原发间变性少突胶质细胞瘤一例

Diagnostic Imaging & Interventional Radiology（2021）

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Abstract

病例资料患者,女, 32 岁,因腰痛、下肢疼痛麻木8个月,加重伴二便障碍1个月入院.查体:腰椎棘突及椎旁压痛和叩击痛,鞍区皮肤感觉减退,右侧为著. CT平扫:腰4-骶2水平椎管内病灶呈等密度影,未见明显钙化征象(图1).MRI表现:腰4-骶2水平椎管内见不均质肿块,上下范围约10.2 cm;T1WI呈等及稍低信号,局部见稍高信号(图2a);T2WI呈高低混杂信号,以稍高信号为主,局部呈低信号(图2b);DWI(b=800 s/mm2)示肿块局部呈扩散受限高信号,相应 ADC值约 0.8×10-3 mm2/s (图2c、2d);增强扫描呈不均匀明显强化,其中T2WI局部低信号区在增强扫描时未见明显强化(图2e);病灶上方椎管内马尾神经增粗并呈纵行线条状强化(图2f).邻近骨性结构未见明显破坏征象.

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