MRI with gadolinium contrast is the diagnostic procedure of choice which will show clear demarcation of the tumour from the normal brain structures whose sensitivity or tumour pick up rate is close to 98%  MR-Angiogram will show displacement of the blood vessels and the vascularity of the tumour in addition (meningiomas and other skull base tumours). CT scan brain will show any widening of the bony canal or erosions if any caused by the tumour in the cerebellopontine angle region.

Microsurgical resection of the tumours is advocated in large tumours ooccupying the CP angle. The age and medical condition of the patient, the pathological behaviour of the tumour are taken into account before planning on the type of surgery offered. Due to significant number of vital neurological structures are closely associated with these tumours, excision of the lesions are undertaken with utmost care with the aid of high magnification microscope, ultrasonic surgical aspirator (CUSA or SONOCA) and of course facial nerve and brainstem neurophysiological intraoperative monitoring. Small tumours and residual lesions can be tackled by radiation therapy (X knife, Gamma knife or Cyber knife radiosurgery will be ideal for this location). If hydrocephalus present, a ventriculo peritoneal shunt or a endoscopic ventriculostomy is required in addition to the tumour surgery.