“…In the literature many techniques and materials have been described in the treatment of CSF leaks, including autologous materials such as abdominal fat, nasal septal mucosa, bone, fascia lata and muscle grafts (6,11,12,13,17,19,21,25,26,35,38,43). The key of endoscopic transnasal surgical repair of the leak is an accurate preoperative location of the CSF fistula and the definition of its dimensions and of the subjective anatomy of the area.…”