Intracranial nasal dermoid sinus cyst associated with colloid cyst of the third ventricle - Case report and new concepts

A case of a 16-year-old male with both a nasal dermoid sinus cyst (NDSC) an d a third ventricle colloid cyst is presented. The NDSC was excised via a s ingle-stage combined intracranial-extracranial approach and the third ventr icle colloid cyst was resected endoscopically, The pathogenetic theories of NDSC and third ventricle colloid cyst are discussed, and an embryological explanation for the simultaneous development of the two lesions in this pat ient is explored. This case is best classified among congenital development al malformations in a category we propose to call 'anterior neuropore corri dor defects.' Copyright (C) 2000 S. Karger AG, Basel.