Posterior fossa surgery
The posterior fossa is found at the posterior region of the skull base. It is separated from the rest of the brain by a membrane called the tentorium. The posterior fossa contains vital structures including the cerebellum, brainstem, cranial nerves and major blood vessels supplying the brain.
Surgical access to this area requires careful planning of patient positioning, route of access, extent of exposure and surgical corridor. These decisions are based on the underlying pathology and is adapted for each type of procedure.
Temporary diversion of the drainage of cerebrospinal fluid may be required and this is achieved by inserting an external drain into the lateral ventricle of the brain.