视交叉前视神经受压会产生交界性暗点。
Compression of the prechiasmatic optic nerve produces a junctional scotoma.
作者信息
Karanjia N, Jacobson D M
机构信息
Harvard University, Boston, Massachusetts, USA.
出版信息
Am J Ophthalmol. 1999 Aug;128(2):256-8. doi: 10.1016/s0002-9394(99)00084-7.
PURPOSE
To demonstrate the clinical-radiologic correlation between a junctional scotoma and a focal lesion compressing the prechiasmatic segment of the distal optic nerve.
METHODS
Case report involving a man with a pituitary adenoma. Clinical correlation was determined by reviewing visual field evaluations and magnetic resonance images.
RESULTS
The tumor compressed the prechiasmatic segment of the distal optic nerve but not the optic chiasm, producing a junctional scotoma documented by Goldmann and automated perimetry. The visual field defect resolved after neurosurgical decompression of the anterior visual pathway.
CONCLUSIONS
A junctional scotoma can be caused by focal as well as large and diffuse lesions injuring the anterior visual pathway, specifically at the junction of the optic nerve and chiasm. This finding supports the existence of Wilbrand fibers.
目的
证明交界性暗点与压迫视交叉前远端视神经节段的局灶性病变之间的临床-放射学相关性。
方法
病例报告，涉及一名患有垂体腺瘤的男性。通过回顾视野评估和磁共振图像来确定临床相关性。
结果
肿瘤压迫视交叉前远端视神经节段，但未压迫视交叉，产生了由戈德曼视野计和自动视野计记录的交界性暗点。在对视神经前视觉通路进行神经外科减压后，视野缺损得到缓解。
结论
交界性暗点可由损伤视神经前视觉通路，特别是在视神经与视交叉交界处的局灶性以及大的弥漫性病变引起。这一发现支持威尔布兰德纤维的存在。
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