title: Acquired mirror-image cerebellopontine angle arachnoid cysts: case report.
abstract: Arachnoid cysts are neurosurgical entities that have long been considered to be congenital in origin. Many examples in the literature suggest that there is a subgroup of arachnoid cysts that are required. The authors present the clinical history of a 17-month-old girl who developed two cerebellopontine angle arachnoid cysts after posterior fossa surgery for a brain tumor. After surgical excision of the tumor the child developed a left cerebellopontine angle cyst. This was treated through a suboccipital craniectomy by evacuating the cyst and excising the cyst wall. Two months later the child developed a second right-sided cerebellopontine angle cyst. It was treated by inserting a cystoperitoneal shunt. This article presents the case with radiological evidence of the acquired nature of the cysts. It also includes a brief review of the clinical presentation, pathogenesis, radiological evaluation, and surgical treatment of arachnoid cysts with emphasis on those occurring in the posterior fossa.
authors.affiliation: Department of Neurosurgery, Emory University School of Medicine, Atlanta, Georgia.
authors.forename: A F
authors.initials: AF
authors.lastname: Krisht
authors.forename: M S
authors.initials: MS
authors.lastname: O'Brien
mesh_terms: D016080:Arachnoid Cysts / Q000209:etiology* / Q000601:surgery; D001932:Brain Neoplasms / Q000601:surgery*; D002530:Cerebellopontine Angle; D002557:Cerebrospinal Fluid Shunts; D003388:Cranial Fossa, Posterior; D005260:Female; D006801:Humans; D007223:Infant; D010537:Peritoneum; D011183:Postoperative Complications