Clinical anatomy study of treating Cerebellopontineanglelesions by partial labyrinthectomy

ObjectiveTo provide anatomic data of pa rtial labyrinthectomy for treating cerebellopontine angle lesions and preserving hearing and vestibular function. MethodsTo perform the super-posterior and posterior semicircular canal resections on 20 adult cadavers, measure the operation distance, and compare the date. ResultsThe distance between superior and posterior petrosal sinus and jugular bulb was ( 15.02 ± 3.69 ) mm, from sigmoid sinus to endolymphatic duct ( 10.62 ± 2.09 ) mm, to internal acoustic meatus porus ( 19.89 ± 3.10 ) mm. from duramater to posterior edge of lateral semicircular canal ( 6.21 ± 1.78 ) mm, to posterior semicircular canal ( 4.07 ± 1.26 ) mm, and to anterior edge of super semicircular canal ( 12.60 ± 2.73 ) mm. ConclusionPartial labyrinthectomy could be used to treat the cerebellopontine angle lesions with preservation of the hearing and vestibular function. The operation field of super-posterior semicircular canal resection is wider than posterior semicircular canal resection.