Once the tumor had been removed and meticulous hemostasis was obtained, this wound was left opened and attention was turned to the right suboccipital area.  A linear incision was made just lateral to the greater occipital nerve.  Sharp dissection was carried down in the subcutaneous tissues and Bovie electrocautery was used to reach the skull.  A burr hole was placed down low using a craniotome.  A craniotomy was turned and then enlarged as a craniectomy to at least 4 cm in diameter.  It was carried caudally to the floor of the posterior fossa and rostrally to the transverse sinus.  Stealth and ultrasound were used to localize the very large tumor that was within the horizontal hemisphere of the cerebellum.  The ventriculostomy had been placed on the left side with the craniotomy and removal of the tumor, and this was draining CSF relieving pressure in the posterior fossa.  Upon opening the craniotomy in the parietal occipital region, the brain was noted to be extremely tight, thus necessitating placement of the ventriculostomy.