| Understanding cancer is not difficult if | | | | malignant tumours metastasize to other |
| we start looking at cancer from the | | | | organs of the body and continue |
| inside. The cancer starts in the cells, | | | | developing unlimitedly. |
| and Cells can break off from a malignant | | | | In the other hand Benign tumors can |
| tumour and start to grow in another part | | | | often be removed by surgery, and they |
| of the body, this is known as a | | | | are not likely to return. Some tumors of |
| secondary tumour. Cells in these tumors | | | | the testicle are benign, but most are |
| are abnormal and divide without control | | | | not. Benign tumors are not usually life |
| or order. They can invade and damage | | | | threatening. Benign tumors, although |
| nearby tissues and organs. Cells grow by | | | | they may cause some health problems |
| dividing in half, such that one cell | | | | depending on their size and location, |
| will become two, and two become four | | | | are not life-threatening. |
| (these new cells are called daughter | | | | Benign (noncancerous) tumors can also |
| cells), etc . Normally, there are very | | | | grow anywhere in your mouth. Benign |
| strict rules as to when a cell can grow | | | | tumors are well-differentiated, in other |
| or not. | | | | words, they differ only slightly in |
| Cells in benign tumors do not spread to | | | | appearance and behavior from their |
| other parts of the body. Most important, | | | | tissue of origin. These tumors are slow |
| benign tumors are rarely a threat to | | | | growing and noninvasive, do not spread |
| life. Cells deprived of oxygen die and | | | | throughout the body, and will often have |
| decay, which is why some cancers have an | | | | a fibrous tissue capsule around them. |
| odor. The term for this new blood vessel | | | | Treatments are related to a particular |
| growth is angiogenesis. | | | | cancer usual behavior. For a cancer that |
| Obviously as you may know already, | | | | is aggressive locally (where it is first |
| malignant tumors are cancerous. These | | | | detected), local treatments such as |
| tumors contain cells that divide and | | | | surgery, radiation therapy, and |
| grow without order. Malignant tumors | | | | photodynamic therapy may be used. |
| (cancers) can spread to other tissues or | | | | Treatment depends on the kind of |
| organs nearby or to other parts of the | | | | treatment the patient had when first |
| body. This is called metastasis . | | | | treated. If the patient had surgery |
| Malignant tumors are tumors that are | | | | alone, the patient may have surgery |
| capable of spreading by invasion and | | | | again or radiation therapy. |
| metastasis. By definition, the term | | | | Radiation therapy destroys or damages |
| "cancer" applies only to malignant | | | | cancer cells by targeting high energy |
| tumors. Malignant means that the | | | | x-rays to the tissues. Radiation therapy |
| disease, if not treated, can progress | | | | is usually painless and is provided in |
| and lead to death. Malignant tumors are | | | | an out patient setting. Radiation is a |
| cancer. Cancer cells can invade and | | | | special kind of energy carried by waves |
| damage tissues and organs near the | | | | or a stream of particles originating |
| tumor. Malignant tissues can invade and | | | | from radioactive substances and |
| damage other tissues and organs. Cancer | | | | delivered by special machines. These |
| cells can then break away from the | | | | radioactive x-rays or gamma rays can |
| tumour and enter the bloodstream or | | | | penetrate the cell wall and damage the |
| lymphatic system, spreading the cancer | | | | nucleus of the cell which prevents |
| to other parts of the body. | | | | growth and division of cells. |
| The serious part of this is that | | | | |