Question category: Neurology
A 68 year old female is brought to her GP by her husband. He states she has become very forgetful of late and is unable to concentrate. He has also noticed over the last few months that she is incontinent of urine and has been walking in an unusual way. On examination there is evidence of gait apraxia and her reflexes are brisk. A CT is performed and shows ventricular dilatation. Which of the following is a definitive treatment?