QUANTITATIVE ANALYSIS OF EXPOSURE OF STAGED ORBITOZYGOMATIC AND RETROSIGMOID CRANIOTOMIES FOR LESIONS OF THE CLIVUS WITH SUPRATENTORIAL EXTENSION

Abstract

OZ and RS craniotomies provide complementary exposure with limited redundancy. Significant visualization of the parasellar region, clivus, and surrounding bony landmarks is obtained. The primary limitation is exposure of the contralateral half of Zones II and III of the clivus. This strategy represents a reasonable option for accessing paracentral petroclival lesions with a supratentorial extension.