The only sure way of knowing whether the tumour was responsible for her problems, however, would be by removing it. The problem, I told them, was that it was impossible to predict from the scan just how great the risk was of making her worse. It is a question of how stuck the surface of the tumour is to the surface of the brain and until you operate you cannot tell how easy or difficult it will be to separate the tumour away from the underlying brain. If it is stuck, the brain will be damaged and she could be left paralysed down the right side of her body and unable to communicate, as each
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