Читать книгу Anterior Skull Base Tumors - Группа авторов - Страница 95

This step involves the removal of two thirds of the nasal septum, allowing surgeons to gain enough space for a better maneuverability of endoscopic instruments, using the 2-nostrils 4-hands technique. Removal must be extended to identify the anterosuperior margin of the dissection, which is represented by the frontal sinusotomy (a Draf IIb in the case of monolateral EER or a Draf III in the case of bilateral EER), and the posteroinferior margin of dissection, which corresponds to a wide sphenoidotomy with removal of intersphenoidal septa and sphenoidal rostrum.