Steinberg G K, Marks M P, Shuer L M, Sogg R L, Enzmann D R, Silverberg G D
Division of Neurosurgery, stanford University Medical Center, California.
Neurosurgery. 1990 Sep;27(3):466-70.
Angiographically occult vascular malformations of the optic nerve and chiasm are extremely rare. Before the advent of magnetic resonance imaging (MRI), it was difficult to diagnose these lesions preoperatively. We report MRI scan findings of optic chiasm cavernous angiomas in two patients with chiasmal syndrome. MRI was useful in localizing the vascular malformation and delineating its characteristics, especially chronic hemorrhage. One patient underwent biopsy of the lesion. The other patient underwent complete microsurgical resection of the malformation with the carbon dioxide laser with preservation of vision. Occult vascular malformations of the optic nerve and chiasm may be a more common cause of visual deterioration than previously recognized. The MRI scan is the imaging modality of choice for diagnosing and following these lesions. In certain patients, these vascular malformations may be amenable to complete surgical removal with stabilization or improvement of visual function.
视神经和视交叉的血管造影隐匿性血管畸形极为罕见。在磁共振成像（MRI）出现之前，术前诊断这些病变很困难。我们报告了两名患有视交叉综合征患者的视交叉海绵状血管瘤的MRI扫描结果。MRI有助于定位血管畸形并描绘其特征，尤其是慢性出血。一名患者接受了病变活检。另一名患者使用二氧化碳激光对畸形进行了完整的显微手术切除，视力得以保留。视神经和视交叉的隐匿性血管畸形可能是导致视力恶化的一个比以往认识到的更为常见的原因。MRI扫描是诊断和跟踪这些病变的首选成像方式。在某些患者中，这些血管畸形可以通过手术完全切除，从而稳定或改善视功能。
