... Magnum Arachnoid Cyst Induces Compression of the Spinal Cord and Syringomyelia: Case Report and Literature Review Haiyan Huang1*, Yuanqian Li1*, Kan Xu1*, Ye Li2, Limei Qu3, Jinlu Yu1 1. Department ... area of the posterior fossa. We performed surgery on this patient. Meanwhile, we undertook a literature review on this topic as well, in order to provide better understanding and relate our experience ... tonsillar herniation after poste-rior fossa arachnoid cyst excision. Case report and literature review. Neurocirugia (Astur). 2007;18:227-31. 18. Martínez-Lage JF, Ruiz-Espejo A, Guillén-Navarro...