Edema along the optic tract: a useful MR finding for the diagnosis of craniopharyngiomas.
Edema along the optic tract: a useful MR finding for the diagnosis of craniopharyngiomas.
复制标题
沿视束水肿：对于诊断颅咽管瘤有用的 MR 发现。
DOI：
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发表时间：
1998
期刊：
影响因子：
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通讯作者：
K. Yamaguchi
中科院分区：
文献类型：
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作者：
M. Nagahata;Takaaki Hosoya;T. Kayama;K. Yamaguchi
背景和目的
颅咽管瘤和其他常见的鞍上肿块引起的水肿模式可能有助于确定该区域病变的鉴别诊断。本研究的目的是确定是否可以使用在颅咽管瘤的MR图像上的水肿扩散模式的诊断。
方法
对8例颅咽管瘤、15例压迫视交叉的大型垂体腺瘤和6例鞍结节脑膜瘤的术前MR图像进行了评价。所有患者均在我院手术治疗并获得病理诊断。我们分析了冠状双回波快速自旋回波图像上肿瘤周围水肿的扩散，并将此结果与对比增强T1加权图像上的肿瘤位置和大小进行了比较。
结果
在5例颅咽管瘤患者中，不仅观察到瘤周水肿，而且观察到水肿沿视神经束沿着扩散，其中1例还观察到一侧视神经水肿。水肿在视觉通路中的位置并不总是与视觉障碍的程度相关。大型垂体腺瘤或鞍结节脑膜瘤患者的视路均无沿着水肿。
结论
颅咽管瘤引起的水肿往往会沿着视神经束扩散。这是一个有用的MR表现，以区分颅咽管瘤与其他常见的鞍旁肿瘤。
BACKGROUND AND PURPOSE
The pattern of edema caused by craniopharyngiomas and other common suprasellar masses could be useful for determining the differential diagnosis of lesions in this region. The purpose of this study was to ascertain whether the pattern of edema spread on MR images can be used in the diagnosis of craniopharyngiomas.
METHODS
The preoperative MR images in eight consecutive patients with craniopharyngiomas, 15 patients with large pituitary adenomas compressing the optic chiasm, and six patients with tuberculum sellae meningiomas were evaluated. All the patients were treated surgically at our hospital and a pathologic diagnosis was obtained. We analyzed the spread of edema surrounding the tumor on the coronal dual-echo fast spin-echo images and compared this finding with tumor location and size as seen on contrast-enhanced T1-weighted images.
RESULTS
Not only peritumoral edema but also edema spreading along the optic tracts was observed in five patients with craniopharyngiomas, one of whom also had edema within one optic nerve. The location of edema in the visual pathway was not always associated with the degree of visual disturbance. None of the patients with large pituitary adenomas or with tuberculum sellae meningiomas had such edema along the visual pathway.
CONCLUSION
Edema caused by craniopharyngiomas tends to spread along the optic tracts. It is a useful MR finding for distinguishing craniopharyngiomas from other common parasellar tumors.