'It's going to create a revolution': how AI is transforming the NHS

Technology is making impressive inroads into cancer treatment, saving lives and money

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The tumour is hard to miss on the scan. The size of a golf ball, it sits bold and white on the brain stem, a part of the organ that sends messages back and forth between body and brain. In many ways it is the master controller: from the top of the spinal cord, the brain stem conducts every heartbeat, every swallow, every breath.

For this young man, the cancer came to light in dramatic fashion. The growing tumour blocked fluid draining from his brain, triggering a huge seizure. Now doctors must work out the best way to treat him.