Cancer in Rhode Island Cancer Control Plan Cancer Prevention Cancer Screening For Cancer Patients Women's Ca Screening Hereditary Breast Cancer Cancer Registry . There are many kinds of cancer, because there are many kinds of cells in the body, and because there are many genes that control cell growth.
Some cancers form solid growths called tumors.
Cancers may harm the body in two ways. They may replace normal cells with cells that don't work properly, and they may kill normal cells. Sometimes cancers stay put. Sometimes they spread to nearby organs. Sometimes they shed cells into the bloodstream or lymphatic system and travel to distant parts of the body.