Figure 1.

Surgical procedure for skull base reconstruction. A: The shape of inverted U was used to open the bottom bone of the saddle; B: Thin the bone beneath the bone flap; C: Break above the bone flap, thin bone along the underside, then fold it down; D: Inverted U-shaped flap formation; E: Lower the bone flap and place it underneath for use; F: Cut the dural membrane at the base of the saddle; G: The structure of the saddle revealed after the tumor was removed; H: The structure of tumor Cavity of the saddle was filled; I: The bone flap is rebacked to reconstruct the sole of the saddle.