Department of Radiology, Nagoya City University Graduate School of Medical Sciences, Nagoya, Japan.
J Thorac Imaging. 2012 Mar;27(2):100-6. doi: 10.1097/RTI.0b013e3181ff6404.
To evaluate computed tomography (CT) and magnetic resonance (MR) imaging findings of posterior mediastinal ganglioneuromas.
Of 14 pathologically confirmed ganglioneuromas seen in 13 patients, 13 were evaluated by CT images with and without contrast, 11 were evaluated with conventional spin-echo MR images, and 5 were evaluated with contrast-enhanced MR examination. The morphologic features, attenuation, signal intensity, and dynamic enhancement pattern of the neoplasms were evaluated.
All lesions were identified as a well-demarcated oval and/or lobular mass. CT attenuation was predominantly low. Calcification on CT scan was seen in 38% of the cases. Whorled appearance (42%) and tailed-shaped edge (14%) were seen on both CT and MR images. Fat components (29%) observed histologically were also detected in tumors on CT and MR images. MR signal intensity in the lesions was mainly low on T1-weighted images and high on T2-weighted images. Contrast enhancement of the tumors was poor in 46% on dynamic CT study. In all 5 contrast-enhanced MR examinations, all lesions were enhanced.
The characteristic findings of posterior mediastinal ganglioneuromas are a craniocaudally oblong-shaped mass, calcification, whorled appearance, tail-like extension, and fat component. Poor enhancement on dynamic CT studies is commonly observed.
评估后纵隔神经节瘤的计算机断层扫描（CT）和磁共振（MR）成像表现。
在 13 例经病理证实的神经节瘤患者中，对 14 例进行了 CT 平扫及增强检查，11 例行常规自旋回波 MR 检查，5 例行增强 MR 检查。评估肿瘤的形态特征、密度、信号强度和动态增强模式。
所有病变均表现为边界清楚的卵圆形或分叶状肿块。CT 平扫密度多为低。38%的病例可见钙化。CT 和 MR 图像上均可见漩涡状（42%）和长尾状（14%）边缘。组织学上观察到的脂肪成分（29%）在 CT 和 MR 图像上的肿瘤中也能检测到。病变在 T1WI 上呈低信号，在 T2WI 上呈高信号。动态 CT 研究中，46%的肿瘤增强程度较差。在所有 5 例增强 MR 检查中，所有病变均有强化。
后纵隔神经节瘤的特征性表现为颅尾形长肿块、钙化、漩涡状、长尾状延伸和脂肪成分。动态 CT 研究中常见增强程度差。
