title: Spinal arachnoid cyst associated with arachnoiditis following subarachnoid haemorrhage in adult patients: A case report and literature review.
abstract: OBJECTIVE
  Arachnoiditis is an inflammatory process resulting with the fibrosis of arachnoid mater. It can vary in severity from mild thickenings to catastrophic adhesions that ruins subarachnoid space. As a result, arachnoid cysts can be formed. Arachnoid cyst induced by symptomatic spinal arachnoiditis is a rare complication of subarachnoid haemorrhages. In this article, we aimed to present a case of spinal arachnoid cyst formation following subarachnoid haemorrhage and examine similar cases in the literature.
  
  
  METHODS
  Forty-six years old, previously healthy female patient has been treated medically for headaches due to perimesencephalic subarachnoid bleeding. Approximately two and a half months later, she started to have severe headaches and diplopia. We detected hydrocephalus and performed ventriculoperitoneal shunt surgery. Two months later, she started to have complaints of weakness in her lower extremities. On neurological examination, she had paraparesis and on spinal magnetic resonance imaging she had an arachnoid cyst lengthening from C7 to T2 and compressing the spinal cord posteriorly. We performed partial laminectomy, drainage of arachnoid cyst and replacement of cystopleural T tube shunt. On follow-up, her lower extremity strength has ameliorated. She was taken into a physical therapy and rehabilitation programme. Three months later she was able to walk with a crutch.
  
  
  CONCLUSIONS
  Subarachnoiditis and associated arachnoid cyst can cause severe morbidity. This rare situation (which especially occurs following subarachnoid haemorrhage of posterior fossa) should be known and physicians should keep in mind that it requires urgent surgical procedure.
authors.affiliation: Department of Neurosurgery, Dr. Lutfi Kirdar Kartal Education and Research Hospital , Istanbul , Turkey.
authors.forename: Recep
authors.initials: R
authors.lastname: Basaran
authors.forename: Mustafa
authors.initials: M
authors.lastname: Kaksi
authors.forename: Mustafa
authors.initials: M
authors.lastname: Efendioglu
authors.forename: Mustafa
authors.initials: M
authors.lastname: Onoz
authors.forename: Ece
authors.initials: E
authors.lastname: Balkuv
authors.forename: Tuncay
authors.initials: T
authors.lastname: Kaner
mesh_terms: D016080:Arachnoid Cysts / Q000150:complications / Q000175:diagnosis / Q000601:surgery*; D001100:Arachnoiditis / Q000151:congenital* / Q000175:diagnosis / Q000601:surgery; D005260:Female; D006801:Humans; D008875:Middle Aged; D020335:Paraparesis / Q000175:diagnosis / Q000601:surgery*; D013117:Spinal Cord Compression; D013345:Subarachnoid Hemorrhage / Q000175:diagnosis / Q000209:etiology / Q000601:surgery*; D013904:Thoracic Vertebrae / Q000601:surgery
keywords: arachnoid cyst; arachnoiditis; hydrocephalus; paraparesis; subarachnoid haemorrhage