article_snippet: A teenager has become the first cancer patient in Britain to have a metal port fitted to A teenager so doctors can blast  drugs directly at A teenager brain tumour.
article_snippet: A 'plug' is screwed into the port which allows chemotherapy drugs to be pumped into his aggressive brain tumour along four hair-thin catheters with pinpoint accuracy.
article_snippet: James Willetts is one of only three cancer sufferers in the world to receive the risky treatment, called 'convection-enhanced delivery' (CEH), which has not even reached stage one trials. '
article_snippet: A 'plug' is screwed into the port which allows chemotherapy drugs to be pumped into the tennis-ball sized tumour along four hair-thin catheters with pinpoint accuracy .
article_snippet: The teen, pictured after a 12 hour operation, is one of only three cancer sufferers in the world to receive the risky treatment, called 'convection-enhanced delivery' (CEH), which has not even reached stage one trials .
article_snippet: The concept has been around for nearly a decade but can be dangerous and so had never been used to treat cancer and or had even reached stage one trials.
highlights_snippet: The risky technique allows chemo drugs to be blasted directly at tumour .