Colloid cyst of the velum interpositum: a common lesion at an uncommon site.
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.
Hingwala
Divyata R
DR
Department of Radiology, King Edward Memorial Hospital and Seth G S Medical College, Mumbai 400012, India. divyatahingwala@gmail.com
Sanghvi
Darshana A
DA
Shenoy
Asha S
AS
Dange
Nitin N
NN
Goel
Atul H
AH
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
D003102:Colloids