Several approaches to the cerebellopontine angle and internal auditory canal have been described for the removal of large acoustic tumors. Of these, the translabyrinthine removal of the large cerebellopontine angle tumors requires extensive removal of bones in order to manage the low-lying tegmen, the anterior sigmoid sinus, and the high jugular bulb. We removed 4 large cerebellopontine angle tumors by the translabyrinthine approach alone. All tumors were totally removed with acceptable facial nerve function. There was a case of CSF leak which was repaired at the revision surgery.
Cerebellopontine Angle* ; Colon, Sigmoid ; Facial Nerve ; Neuroma, Acoustic*

Advanced techniques of nasal endoscopy made it possible to approach the optic nerve, pituitary gland, and anterior skull base transnasally. Epidural or brain abscess caused by ascending infection through the defect of the fovea ethmoidalis can be drained with reduced morbidity by endoscopic sinus surgery. Recently we have experienced a brain abscess that was managed by endoscopic transnasal drainage successfully.
Brain Abscess* ; Brain* ; Drainage* ; Endoscopy ; Optic Nerve ; Pituitary Gland ; Skull Base