关键词: Cranial nerve Diffusion tractography Inferior rectus palsy Uncal protrusion

来  源:   DOI:10.25259/SNI_180_2023   PDF(Pubmed)

Abstract:
UNASSIGNED: Isolated inferior rectus muscle palsy is a rare entity and even more rarely induced by an anatomical conflict. We report here a clinical case of third cranial nerve (CN III) compression in its cisternal segment by an idiopathic uncal protrusion in a patient presenting an isolated inferior rectus muscle palsy.
UNASSIGNED: We report a case of an anatomical conflict between the uncus and the CN III in the form of a protrusion and highly asymmetrical proximity of the uncus and asymmetrically thinned nerve diameter deviated from its straight cisternal trajectory on the ipsilateral side were supported by an altered diffusion tractography along the concerned CN III. Clinical description, review of the literature, and image analysis were done including CN III fiber reconstruction using a fused image from diffusion tensor imaging images, constructive interference in steady state, and T2-fluid-attenuated inversion recovery images on a dedicated software (BrainLAB AG).
UNASSIGNED: This case illustrates the importance of anatomical-clinical correlation in cases of CN deficits and supports the use of new neuroradiologically based interrogation methods such as CN diffusion tractography to support anatomical CN conflicts.
摘要:
孤立的下直肌麻痹是一种罕见的实体,甚至很少由解剖冲突引起。我们在这里报告了一例临床病例,该患者表现为孤立的下直肌肌麻痹,其特发性短突突出导致第三颅神经(CNIII)压迫脑池段。
我们报告了一个病例,该病例与CNIII之间发生了解剖学冲突,表现为突出,高度不对称接近,并且神经直径不对称变细,偏离了同侧的直脑池轨迹。临床描述,文献综述,并进行了图像分析,包括使用来自扩散张量成像图像的融合图像进行CNIII纤维重建,稳定状态下的建设性干涉,以及在专用软件(BrainLABAG)上的T2流体衰减反演恢复图像。
该案例说明了在CN缺陷的情况下解剖-临床相关性的重要性,并支持使用新的基于神经放射学的询问方法,例如CN扩散束造影来支持解剖CN冲突。
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