C1 Some scientists say a report of a cancer gene was wrong.

Why would a cancer gene make a cell stop growing?

Thirty or so years ago we didn't know what cancer genes were.

Twenty years ago we didn't know what human cancer genes were.

These people may be born with one of the cancer genes already damaged.

Q. If you test positive for a cancer gene, how high is the actual risk of getting the disease?

In each case the virus was close to a dormant cancer gene.

They classified it as a cancer gene, but remained puzzled.

It is unethical, he said, to prevent patients from having tests for cancer genes if they want them.

Most cancer genes that have been discovered to date turn out to be unreachable.