For the attack on the well recognized encapsulated tumors of the cerebellopontile angle (erroneously, I think, called acoustic tumors) the bilateral cerebellar approach has been adopted by all neurosurgeons. I know of no exception to this rule. The purpose of this communication is to present a radical departure from this standardized approach, namely, to offer in its stead, a unilateral exposure, essentially similar to that now used when the fifth, eighth and ninth nerves are divided for various symptoms referable to these nerves.
Originally a unilateral approach was proposed by Krause; it was used by others and subsequently given up because it was entirely inadequate. A pertinent query is, therefore, Why again propose a seemingly similar approach which has been proved to have disastrous consequences? The answer is that new developments, particularly methods of space reduction, then not known or not properly appreciated, now offer all of the advantages obtained