What is CANCER. four stages of Cancer

What is Cancer. Four stages of Cancer .

Cancer.

Cancer is totally related to the cell. Cells are the basic structural and functional unit (or building blocks) of our body. Typically, our body form new cells as per the need, replacing old cells that die and that is a natural process. At times, this process goes wrong. New cells keep growing and old ones stop dying (i.e. irregular cell cycle). This irregularity of cells leads them to accumulate as 'cell mass' known as the tumor. Tumors can be benign or malignant. Cells from benign tumor keep themselves at the place of their origin and proliferate there only, while, cells from malignant tumor attack adjacent tissues as well. They can likewise split away and spread to different parts of the body. There are more than 100 distinctive sorts of cancer. Most cancers are named according to the place of their origin in the body. For instance, lung cancer starts in the lung, and breast cancer starts in the breast. The spread of cancer from one part of the body to another is called metastasis. Symptoms and treatment depend on the cancer type and how advanced it is. Most treatment arrangements may incorporate surgery, radiation and/or chemotherapy. Some may include hormone treatment, biologic treatment, or stem cell transplantation.

Four stages of cancer

The most widely used cancer staging system is called the TNM classification system. "The main purpose for staging is to evaluate the extent of cancer spread," and determine a patient's prognosis.

The TNM Classification System assigns letters and numbers to the cancer to describe the tumor (T), the lymph nodes (N), and how much the cancer has metastasized (M).

These individual evaluations help determine the overall stage of the cancer and gives the doctor information on how the disease is likely to progress over time, what symptoms to expect, what the survival rate is, and what some of the potential complications could be.

Generally speaking, the earlier the stage of the cancer, the better the prognosis.

Staging also dictates treatment options. For instance, if an early-stage cancer is located in one particular area, it may be easier to remove surgically or treat with radiation as opposed to a late-stage cancer that has spread to other areas of the body and may require Chemotherapy.

Tumor

The T category in TNM provides information about the tumor, like its size, how much it has grown into the organ it originated from, and whether it has spread to other tissues.

• TX means the tumor can't be measured.

• T0 means the tumor can't be found.

• Tis means the cancer is growing only in the most superficial layer of tissue (this is usually true with Stage 0 or in situ cancer).

• T1-T4 describes the size of the tumor and the extent to which it has spread to nearby tissues. The higher the number after the T, the larger the tumor.

Lymph nodes

The N category describes whether the cancer has spread to the lymph nodes.

• NX means the nearby lymph nodes can't be evaluated.

• N0 means nearby lymph nodes don't contain cancer.

• N1-N3 describes the size, location, and/or the number of nearby lymph nodes affected by the cancer.

Metastasis

Metastasis shows whether the cancer has spread to other parts of the body.

• MX means that the metastasis can't be measured.

• M0 means that the cancer hasn’t spread widely.

• M1 means that the cancer has spread to distant organs or tissues.

Cancer stages 0 to IV

Once T, N, and M are determined, a doctor will assign the cancer a stage from zero to four. Staging differs a bit from cancer to cancer-sometimes stages are subdivided into A and B categories, for instance-but here's a ballpark overview of how each stage is diagnosed.

Stage 0 cancer

Truth be told, whether or not stage 0 is the first and earliest stage of cancer or a precancerous stage is up for debate. (And not all cancers have a stage 0.)

For most cancers, stage 0 is called carcinoma in situ (CIS). "Stage 0 typically means that there are cancer cells that haven't penetrated through the lining or the initial wall.

Stage I and II cancer

In these stages, the cancer is generally in only one area of the body. Stage I cancer is usually smaller in size and stage II is usually larger in size.

Stage III

During this stage, it often means that the cancer has spread to the lymph nodes.

Stage IV

This stage typically indicates that the cancer has spread widely throughout the body or has metastasized.