One of the first visible spots where these tumors metastasize is the left supraclavicular lymph node.

By stopping the growth of blood vessels, scientists hope to cut the means by which tumors can nourish themselves and thus metastasizing.

Breast cancer, colon cancer, and tumors of the female genital tract may metastasize to the appendix.

Although he sought treatment in various hospitals around China, the tumour metastasized to his liver and lungs.

Although benign tumors will not metastasize or locally invade tissues, some types may still produce negative health effects.

Patients whose tumors have not metastasized usually have a good chance for long-term survival, depending on the subtype of the tumor.

The death toll from this fictional attack is tallied at 375, with a forecast of thousands more as tumors metastasize over the years.

The second method is more effective but, Dr. Hoffman contends, the tumors often do not metastasize.

But, he said, "even in the best cases - small tumors, no positive nodes - tumors can metastasize."

Two mutations in mitochondria have been found to increase the chance a tumor will metastasize.