This week's artwork was donated by Jaclyn, a pediatric cancer patient who received treatment at The Children's Hospital of Philadelphia . Answers About Metastatic Cancer 1.
Cancer is a group of many related diseases that begin in cells, the body's basic unit of life.
The body is made up of many types of cells. Normally, cells grow and divide to produce more cells only when the body needs them. This orderly process helps keep the body healthy. Sometimes cells keep dividing when new cells are not needed. These extra cells may form a mass of tissue, called a growth or tumor.