Skull base mapping.

Early experience with medium to large tumors of the temporal region has re-emphasized the value of radiologic preoperative plotting of these space occupying lesions in the sagittal, coronal, and horizontal planes. Attention to probable pathology, neurovascular structures and patient's medical status has been important in determining resectability. A standard format of the interior and exterior of the skull base and cervical spine has been employed to map these lesions. Such devices have been used by otolaryngologists in the past to depict laryngeal lesions; and provide for the skull base surgeon a common base of comparison of tumor size, chart documentation, and a means to facilitate communication among other specialists. Experience with 36 cases of skull base tumors seen since July 1979 has emphasized the occult manner in which these lesions may present.