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. CASE DESCRIPTION: 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.
Subject(s)
Central Nervous System Cysts/pathology , Central Nervous System Cysts/surgery , Cerebral Ventricles/pathology , Cerebral Ventricles/surgery , Adult , Central Nervous System Cysts/complications , Colloids , Female , Headache/etiology , Humans , Seizures/etiologyABSTRACT
A 10-month-old male child with severe congenital hydrocephalus due to aqueduct stenosis presented with cranial migration of the entire ventriculo-peritoneal (VP) shunt. The complete shunt assembly, including the shunt chamber, was noted in the dilated ventricles. The migrated shunt was left in situ. A VP shunt was performed on the opposite side. The complete intraventricular migration of a VP shunt is a rare complication. This complication may be avoided by firm anchoring of the connector sites to the periosteum, and avoidance of large burr holes and dural openings. The possible mechanisms of such an event and the relevant literature are discussed.