Malignant Brain Tumour

The brain tumour is abnormally malformed tissue that is growing fast (white straight arrow).

The abnormal tissue is compressing over the adjacent tissue.

The tumour causes extra water in the adjacent brain tissue.

The abnormal extra cells of the tumour need more nutrient which means more vessels are needed. Therefore after injecting dye in the patient’s vessel tumour becomes brighter than adjacent tissue due to more vessels within it (bent arrow).