论文部分内容阅读
目的分析节细胞神经瘤的MRI表现及其血液动力学特征,以提高其诊断准确性。方法经手术病理证实的节细胞神经瘤9例,分别经MRI自旋回波T1WI、快速自旋回波T2WI、屏气扰相梯度回波T1WI动态增强扫描。仔细复习MRI扫描结果并和手术病理作回顾性对照分析。结果9例节细胞神经瘤中,脊柱旁6例(颈部2例,纵隔1例,腹膜后3例),肾上腺3例。肿瘤直径3.7~16.4 cm,平均7.1 cm。SE T1WI为均匀低信号4例,混杂低信号5例;FSE T2WI显著高信号肿瘤3例,高低信号混杂5例,等信号1例。SPGR动态增强动脉期轻微强化,门脉期和延迟期为轻度进行性延迟强化。强化方式包括线条交织状强化6例,漩涡状强化2例,斑点状强化1例。3例肿瘤内血管强化。所有肿瘤境界清楚,瘤体自身受压变形7例,形成伪足样尖角4例。5例肿瘤推移邻近血管,所有与肿瘤解剖关系密切的血管形态正常。结论节细胞神经瘤MRI征象具有特点,动态MR可提高诊断率。
Objective To analyze the MRI findings and hemodynamic characteristics of ganglioneuroma in order to improve its diagnosis accuracy. Methods Nine cases of ganglioneuroma confirmed by surgery and pathology were scanned with MRI T1WI, T2WI and T1WI respectively. Careful review of MRI findings and surgical pathology for retrospective analysis. Results In 9 cases of ganglioneuromas, 6 cases were found adjacent to the spine (2 in the neck, 1 in the mediastinum, 3 in the retroperitoneum) and 3 in the adrenal gland. Tumor diameter 3.7 ~ 16.4 cm, an average of 7.1 cm. SE T1WI was uniform low signal in 4 cases, mixed low signal in 5 cases; FSE T2WI significantly high signal tumor in 3 cases, high and low signal mixed in 5 cases, and other signals in 1 case. SPGR dynamic enhanced arterial phase slightly enhanced portal phase and delayed mild delayed progressive enhancement. Intensification methods include 6 cases of line intertwined enhancement, 2 cases of swirl enhancement, and 1 case of speckle enhancement. 3 cases of tumor blood vessels strengthen. All tumors clear state, the tumor itself compression deformation in 7 cases, the formation of pseudopodia-like corner in 4 cases. In 5 cases, the tumor moved close to the blood vessel, and all the blood vessels closely related to the tumor anatomy were normal. Conclusions MRI findings of ganglioneuroma have the characteristic that dynamic MR can improve the diagnosis rate.