what is it called when a cancer spreads to other organs/parts?
This causes problems in the part of the body where the cancer started. Cancer cells can also spread to other parts of the body. For instance, cancer cells in the lung can travel to the bones and grow there. When cancer cells spread, itâs called metastasis (meh-TAS-tuh-sis). When lung cancer spreads to the bones, itâs still called lung cancer.