The central position of chordoma of 9 cases was located on the clivus of the skull base while 1 case was located on the boundary of the left occipital and temporal bone.

• 脊索瘤10例中有9例肿瘤的中心部位在颅底中线处的斜坡，1例肿瘤的中心部位在左侧枕骨、颞骨交界区；