middle fossa การใช้

• The skull is an incompressible closed space with a limited volume ( middle fossa.
• Small, lateralized tumours in patients with good hearing should have the middle fossa approach.
• The exact role that temporal lobe abnormalities play in the development of middle fossa arachnoid cysts is unknown.
• There are three main surgical approaches for the removal of an acoustic neuroma : translabyrinthine, retrosigmoid / sub-occipital and middle fossa.
• In some cases, arachnoid cysts occurring in the middle fossa are accompanied by underdevelopment ( hypoplasia ) or compression of the temporal lobe.
• In the IAC ( internal auditory canal ) decompression, a middle fossa approach is employed to expose the bony roof of the IAC without any attempt to remove the tumor.
• The tympanic antrum is bounded above by a thin plate of bone, the tegmen tympani, which separates it from the middle fossa of the base of the skull; below by the mastoid process; laterally by the squama just below the temporal line, and medially by the lateral semicircular canal of the internal ear which projects into its cavity.