CHORDOMA OF THE CLIVUS

Abstract

1. Chordoma of the clivus is a rare invasive and destructive tumor. It may grow rapidly, but metastasizes very seldom.2. Roentgen examination will often show osteolysis of the clivus. Calcification within the tumor occurs more frequently than reported in the past.3. Vertebral angiograph demonstrates the displacement of the basilar artery and its components by the clivus tumor.4. Forward extension of the neoplasm and hydrocephalus produce changes in the carotid arteriogram.5. The venous phase may offer valuable clues.6. Air and oil contrast studies may reveal encroachment upon the third, fourth, and lateral ventricles, aqueduct and cisterns.