Instruments.- Subfrontal approaches (unilateral, bilateral, transfrontal basal).- Frontolateral approach + Supraorbital.- Frontotemporal approach.- Fronto Temporo Orbito Zygomatic approach (with cavernous sinus approaches).- Subtemporal approach.- Suboccipital lateral approaches (presigmoid).- Suboccipital lateral approaches (retrosigmoid).- Suboccipital median approach.- Translabyrinthine and transcochlear petrosal approaches ( ).- Middle cranial fossa approach.- Cranio Cervical Junc7on approaches.- Transsphenoidal approaches: Endoscopic. Microscopic. Assisted.- Extended endoscopic skull base approaches.- Orbital approaches.- Transoral approach.- Transmaxillary and midface degloving approaches (osteotomies of the facial bones).- Transmandibular approach.