Interesting debate on the net - should all brain tumours be considered and called 'cancer'? Even the low grade ones? The moniker 'brain tumour' rather than 'brain cancer' doesn't always indicate that whatever tumour one has in the skull, it can still be potentially fatal. My problem is mine is 'Grade 1' and so far non-malignant, so should I call it 'cancer'? Opinion is divided, that cancer is an emotive word and in respect to brain tumours, public opinion would have it that you're automatically dead! But then public reaction to the word 'cancer' can seem that way with any form, despite curative treatment and increased survivability with some.
The other opinion is of course that any brain tumour no matter how slow growing, is cancerous and the word 'benign' is a misnomer. Cancer to me is where the growth of mutated tissue invades and changes the nature of the affected organ/body part cells by spreading within it. Benign is where the tumour remains in its own space but pressing against against the organ/body part, with the possibility of impnging surrounding tissue as opposed to invading it. Both scenarios are not good with fatality often being the end result with most if not treated, no matter how long term or slow that growth may be.
If opinions are correct about all brain tumours being 'cancerous' then certainly Algy by the very fact that he is growing could be considered a 'cancer'. In any event, within the skull and spine, tumours are even more damaging as there is no room for expansion and therefore tissue damage is greater what ever the level of aggression and invasion/impingement.
A sobering thought!
A link to a defintion of benign brain tumours. http://www.medicinenet.com/brain_tumor_symptoms/views.htm