ABSTRACT
Injury to the dura mater lining the anterior cranial fossa may occur. Bearing in mind the extent of disease which is usually being treated, this may be unavoidable. It leads to a CSF leak, but this can readily be plugged with a muscle graft because of the superb surgical exposure offered by the procedure. Both the supratrochlear and the supraorbital nerves are usually divided with the Lynch incision, and a considerable area of numbness may be present initially in the forehead and anterior scalp, although this tends to improve with the passage of time as the nerves regenerate. Large lesions may have eroded the roof of the orbit, and the surgeon may find that the orbital periostium is exposed as the lesion is removed. This is not usually of any significant consequence.
