Brain cancer. Coloured computed tomography (CT) scan showing a metastatic brain cancer (round and dark at centre left). An oedema (fluid accumula- tion,green-red) is seen crowning the metastatic area. A metastatic brain cancer arises from cancerous formations in other parts of the body,most commonly from lungs or breast,which are spread via the bloodstream. All brain cancers are dangerous because of the build up of pressure in the brain as the tumour expands. Such compression may cause loss of vision,speech and other sensory difficulties. In many cases a surgical removal is not possible because the tumour is either inaccessible or too extensive | |
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