Clival Chordoma
A clival chordoma is a malignant tumor of the clivus. The clivus is a portion of bone located at the base of the skull.Etiology for Clival Chordoma
A clival chordoma arises from embryonic notochord that is present before birth. A tumor arises when the notochordal elements mutate and begin to grow abnormally. The reason for growth is unclear.