Microsurgical anatomy of the approach to the base of the skull.
D005004:Ethmoid Bone / Q000601:surgery; D006801:Humans; D008722:Methods; D008866:Microsurgery; D009666:Nose / Q000033:anatomy & histology; D010256:Paranasal Sinuses / Q000033:anatomy & histology; D012658:Sella Turcica / Q000601:surgery; D012886:Skull / Q000033:anatomy & histology / Q000601:surgery*