title: Colloid cyst of the velum interpositum: a common lesion at an uncommon site.
abstract: BACKGROUND
  Colloid cysts are typically located in the region of the anterior third ventricle in the proximity of foramen of Monro. Although 'endodermal cyst' has been identified in several regions of the brain, location of characteristic colloid cyst entirely within the confines of velum interpositum and outside the ventricles has not been reported earlier.
  
  
  METHODS
  We report a unique case of colloid cyst located in the region of velum interpositum in a 33-year-old patient with headache and seizures. Such a location of the colloid cyst has not been identified earlier in the literature. The literature on pathogenesis of colloid cysts in general is briefly reviewed.
  
  
  CONCLUSIONS
  Colloid cyst located in the velum interpositum is reported. Such a location gives additional information on the pathogenesis of these lesions.
authors.affiliation: Department of Radiology, King Edward Memorial Hospital and Seth G S Medical College, Mumbai 400012, India. divyatahingwala@gmail.com
authors.forename: Divyata R
authors.initials: DR
authors.lastname: Hingwala
authors.forename: Darshana A
authors.initials: DA
authors.lastname: Sanghvi
authors.forename: Asha S
authors.initials: AS
authors.lastname: Shenoy
authors.forename: Nitin N
authors.initials: NN
authors.lastname: Dange
authors.forename: Atul H
authors.initials: AH
authors.lastname: Goel
mesh_terms: D000328:Adult; D020863:Central Nervous System Cysts / Q000150:complications / Q000473:pathology* / Q000601:surgery*; D002552:Cerebral Ventricles / Q000473:pathology* / Q000601:surgery*; D003102:Colloids; D005260:Female; D006261:Headache / Q000209:etiology; D006801:Humans; D012640:Seizures / Q000209:etiology
chemical_list: D003102:Colloids