Cancer is a disease marked by a party with the division of cells that are not restrained and the ability of cells to attack other biological networks, with good growth in the neighboring network (invasions) or with the migration of cells to distant places (Metastasis). Growth is not restrained due to damage DNA, causing mutation in the genes vital that control cell division. Some fruit mutation may be required to change normal cells into cancer cells. Mutation-mutation is often caused physical and chemical agents called Carcinogen. Mutation can occur spontaneously (obtained) or inherited (germline mutation). Cancer can cause many different symptoms, depending on the location and character of the violence and whether there Metastasis. A diagnosis that determine Microscopic examination usually requires a network that obtained with biopsy. Once diagnosed, cancer is usually treated with surgery, chemotherapy and / or radiation.

If not three, most cancer causing death; cancer is one of the main causes of death in developing countries. Most cancers can be treated and cured, especially if treatment starts since the beginning. Many forms of cancer associated with environmental factors that can be avoided. Smoking tobacco can cause cancer of the many other environmental factors.

Tumors (Latin; swelling) pointed mass network that is not normal, but can be "vicious" (cancerous) or benign (not cancerous). Only the malignant tumors able to attack other networks or bermetastasis