Endoscopic-assisted transcolumellar approach to the clivus: an anatomical study.

Objective: Surgical exposure of the clivus and retroclival region is a challenging problem. Several extracranial and intracranial approaches using microsurgical techniques have been proposed in the search to optimize the exposure of the clival region. The objective of the present study was to develop an endoseopic-assisted transcolumellar approach to the anterior clivus.