The oldest definition of the cancer was written between 3000–1500 years B.C. by ancient egyptiens and they were about the breast cancer. The malign melonama was encountered 2400 years ago in a mummy was from Incas in Peru.The most common tumour encountered in ancient ruins is osteosarcom because of the protection of the bone tissues without decaying. The malignant and nonmalignant terms were used by Hipokrat firstly in his studies and an ancient greek word carcinos means the crab was used.The today’s terminology was made up translating the carcinos to cancer or carsinoma.
The reason of cancerious cells to increase is the damage on DNA.The body cannot repair the damages on the cancerious cells while other damages is repaired.The cancer is a mass formation called solid.Some kind of cancers like leukamea dont have tumour form.The all tumours are not cancerious and rarely spread out the organ which the tumour exists first and dont threat the life.The cancers differ according to the region they occur.The increasing speeds,spreadings and the treatment methods depending on these factors differ.The lifetime also differs on different people according to the smoking,alcohol,life style and hormonel foods.