title: Choroidal fissure cerebrospinal fluid-containing cysts: case series, anatomical consideration, and review of the literature.
abstract: BACKGROUND
  Cerebrospinal fluid (CSF)-containing cysts at the level of the choroidal fissure are rare embryological entities infrequently described in the literature because of their benign nature. On the occasion of a case series, we present an overview of the literature and discuss anatomical and embryological location, imaging characteristics, presenting symptoms, and treatment indication of these lesions.
  
  
  METHODS
  We identified, in a retrospective study of a database with 81 patients harboring 86 supratentorial intracranial cysts, six patients with a CSF-containing cyst at the level of the choroidal fissure. In all cases, presenting symptoms were mild and the cysts were considered a fortuitous diagnosis. None of the patients was treated surgically, and the cysts remained stable at radiological follow-up. We performed a literature search for cerebral cysts and choroidal fissure cysts in particular.
  
  
  RESULTS
  Only one large study purely addressing choroidal fissure cysts was found in the literature.
  
  
  CONCLUSIONS
  CSF-containing cysts at the level of the choroidal fissure may be of the arachnoid or the neuroepithelial type, but pathological confirmation of a CSF-containing cyst at this specific location has never been published. Very infrequently they are symptomatic, and surgical treatment is hardly ever necessary.
authors.affiliation: Department of Neurosurgery, University Hospitals Leuven, Leuven, Belgium. lars.dejong@uzleuven.be
authors.forename: Lars
authors.initials: L
authors.lastname: de Jong
authors.forename: Liesbeth
authors.initials: L
authors.lastname: Thewissen
authors.forename: Johannes
authors.initials: J
authors.lastname: van Loon
authors.forename: Frank
authors.initials: F
authors.lastname: Van Calenbergh
mesh_terms: D000293:Adolescent; D016080:Arachnoid Cysts / Q000601:surgery; D001289:Attention Deficit Disorder with Hyperactivity / Q000209:etiology; D002648:Child; D003560:Cysts / Q000134:cerebrospinal fluid* / Q000473:pathology; D016208:Databases, Factual; D003937:Diagnosis, Differential; D004848:Epithelium / Q000473:pathology / Q000601:surgery; D005128:Eye Diseases / Q000134:cerebrospinal fluid* / Q000473:pathology / Q000601:surgery; D007839:Functional Laterality / Q000502:physiology; D006261:Headache / Q000209:etiology; D006801:Humans; D007223:Infant; D007859:Learning Disabilities / Q000209:etiology; D008279:Magnetic Resonance Imaging; D009290:Narcolepsy / Q000209:etiology; D012189:Retrospective Studies; D016896:Treatment Outcome