This week's artwork was donated by Vansom, a pediatric cancer patient who received treatment at The Children's Hospital of Philadelphia .
Malignant tumors are cancerous and benign tumors are non-cancerous.
An animation of carcinogenesis. The information provided through OncoLink should not be used for diagnosing or treating a health problem or a disease. It is not a substitute for professional care. If you have or suspect you may have a health problem, you should consult your health care provider.