Definition of Cancer
Cancer is a disease caused by the growth of tissue cells that are not normal body. Cancer cells will grow rapidly, out of control, and will continue to divide, then infiltrate the surrounding tissue (invasive) and continue to spread through the connective tissue, blood, and the attack vital organs and the spinal nerves. In normal circumstances, cells will divide only if there is a replacement of cells that have died and broken. In contrast to cancer cells continue to divide even though the body does not need it, so that will happen accumulation of new cells is called malignant tumors. Cell accumulation is urgent and damaging normal tissue, thus disturbing the organs they occupy. Cancer can occur in various tissues in various organs in each body, from feet to head. If the cancer occurs at the surface of the body, will easily know and treated. But if there is inside the body, the cancer would be difficult to know, and sometimes – sometimes have no symptoms. If symptoms develop, usually has an advanced stage that it is difficult to treat.
Cancer is not a mild disease. An initial step in the detection of cancer treatment is right that the symptoms that appear on the patient’s body are truly malignant cancer cells. This detection can be done with a biopsy examination,
Normally, cells grow and divide to form new cells as the body needs them. When cells grow old, they die, and new cells take their place.
Sometimes, this orderly process goes wrong. New cells form when the body does not need them, and old or not a cells die when they should die. Extra cells can form a mass of tissue called a growth or tumor. Tumors can be benign or malignant, and can be classified:
1. Benign tumors are not cancer
a. Benign tumors are rarely life threatening.
b. In general, benign tumors can be removed, and they usually will not grow back.
c. The cells from benign tumors do not attack the tissues around them.
d. Cells of benign tumors do not spread to other parts of the body.
e. Polyps, polyps, cysts, cysts, and genital warts are types of growth-a benign growth from the cervix (the cervix).
2. Malignant tumors are cancer:
a. Malignant tumors generally are more serious than benign tumors. They may be life threatening.
b. Malignant tumors often can be lifted. But sometimes they grow back.
c. Cells of malignant tumors can invade and damage tissues and organs nearby.
d. Cells of malignant tumors can spread (metastasize) to other parts of the body. Cancer cells spread by breaking from the tumor origin (primary) and enter the bloodstream or lymphatic system (lymphatic system). Cells attacking other organs and form new tumors that damage these organs. The spread of cancer is called metastasis.
When cancer spreads from the point of origin to other parts of the body, the new tumor has the same kind of cells are abnormal and the same name as the primary tumor. For example, if cervical cancer spreads to the lungs, the cancer cells in the lungs are actually cells of cervical cancer. The disease is cervical cancer is metastatic, rather than lung cancer. For this reason, he was treated for cervical cancer, not lung cancer. Doctors call the new tumor disease “distant” or metastatic.
From various sources
