Savino G, D'Ambrosio A, Tamburrelli C, Colosimo C, Dickmann A
Department of Ophthalmology, Catholic University of the Sacred Heart, Rome, Italy.
Ophthalmologica. 1998;212(6):424-8. doi: 10.1159/000027381.
We report a peculiar case of congenitally restricted sursumduction caused by an anomalous band-like structure within the right orbit which was completely distinct from the extraocular muscles. Imaging (static and dynamic ultrasound studies of the orbit and globe, CT and MRI) revealed the origin of the anomalous structure in Zinn's ring, its intraconal course and bulbar insertion. The ultrasound characteristics were similar to those of the extraocular muscles and optic nerve, and contractile activity appeared to occur during eye movements. The seemingly muscular nature of this structure and its total autonomy with respect to the normal extraocular muscles distinguish this case from previously reported cases of congenital restrictive strabismus.
我们报告了一例特殊的先天性上转受限病例，其由右眼眶内一条异常的带状结构引起，该结构与眼外肌完全不同。影像学检查（眼眶和眼球的静态及动态超声检查、CT和MRI）显示该异常结构起源于Zinn环，走行于肌锥内并附着于眼球。超声特征与眼外肌和视神经相似，且在眼球运动时似乎会出现收缩活动。该结构看似肌肉的性质及其相对于正常眼外肌的完全自主性，使该病例有别于先前报道的先天性限制性斜视病例。
