Today, for example, doctors treat cancer patients without knowing, in most cases, whether a person's tumor can respond or resist.

These tumors generally do not respond to chemotherapy.

How the tumor responded to chemotherapy or radiation therapy that may have been given first.

If your tumor doesn't respond I want you out of there as soon as possible.

The tumor had responded very quickly to Taxol, and it was wonderful watching it shrink in size for the first couple of weeks.

This can help show how a tumor will respond to treatment.

In her final public appearances, Reeve stated that the tumor had responded to therapy and was shrinking.

ER-positive tumors tend to grow less aggressively and may respond favorably to treatment with hormones.

Cases involving difficult to remove or multiple tumors have responded well to strontium-90 radiotherapy as an alternative to surgery.

If the tumor does not respond, it may be benign (not cancer).