To dream that you have cancer, denotes hopelessness, grief, self-pity, and unforgiveness. You feel you are wasting your life away. This dream also represents areas in your life which are bothering you, disturbing you, and hurting you in some emotional way.

To dream of your brain, suggests that you are under severe intellectual stress. It may also symbolize your problem-solving abilities and that you need to put those abilities to use.

I dreamt that I had two brain tumours last night...