Have you ever asked yourself the question, what is cancer? This is actually a somewhat frightening question, especially if you are suspecting yourself of having the said disease. But in a plain definition, cancer refers to a disease which is often described by the uncontrolled growth as well as separation of unusual cells involving other tissues in the body. The cells which have developed then invade different body organs through the lymph and blood system. This invasion of cells is essentially what makes cancer truly alarming and so, it needs to be appropriately treated as soon as possible. There are lots of causes of cancer. Most of these causes can basically help you to answer directly the question as to what is cancer. For one, it can be