Cancer : Carcinoma ; Malignant tumor

Cancer is the uncontrolled growth of abnormal cells in the body. Cancerous cells are also called malignant cells.

Causes, incidence, and risk factors

Cells is the foundations of living issues.
Cancer grows away from normal cells in the body. Normal cells grow if the body demands them, and die once the body does not need them. Cancer seems to happen if the growth of cells in the body is out of control and cells separate too rapidly. Additionally, it may happen any time cells forget ways to die.
There are various kinds of cancers. Cancer can develop in almost any organ or tissue, like the lung, colon, breast, skin, bones, or nerve tissue.
There are lots of factors behind cancers, such as:

• Benzene and other chemicals
• Drinking excess alcohol
• Environmental toxins, such as certain poisonous mushrooms and a type of poison that can grow on peanut plants (aflatoxins)
• Excessive sunlight exposure
• Genetic problems
• Obesity
• Radiation
• Viruses

However, the main cause of several cancers is still unidentified.
The most popular reason for cancer-related death is usually lung cancer.
The 3 most frequent cancers in men in the usa are usually:

• Prostate cancer
• Lung cancer
• Colon cancer

In women in the United States, the 3 most common cancers are:

• Breast cancer
• Colon cancer
• Lung cancer

Some cancers are more common in certain parts of the world. For example, in Japan, there are many cases of stomach cancer, but in the United States, this type of cancer is pretty rare. Differences in diet may play a role.
Some other types of cancers include:

• Brain cancer
• Cervical cancer
• Hodgkin's lymphoma
• Kidney cancer
• Leukemia
• Liver cancer
• Non-Hodgkin's lymphoma
• Ovarian cancer
• Skin cancer
• Testicular cancer
• Thyroid cancer
• Uterine cancer

Support Groups

The diagnosis and treatment of cancer often causes a lot of anxiety and can affect a person's entire life. There are many resources for cancer patients.
See: Cancer resources

Expectations (prognosis)

The outlook depends on the type of cancer. Even among people with one type of cancer, the outcome varies depending on the stage of the tumor when they are diagnosed.
Some cancers can be cured. Other cancers that are not curable can still be treated well. Some patients can live for many years with their cancer. Other tumors are quickly life-threatening.

Complications

One complication is that the cancer may spread. Other complications vary with the type and stage of the tumor.

Calling your health care provider

Contact your health care provider if you develop symptoms of cancer.

Prevention

You can reduce the risk of getting a cancerous (malignant) tumor by:

• Eating a healthy diet
• Exercising regularly
• Limiting alcohol
• Maintaining a healthy weight
• Minimizing your exposure to radiation and toxic chemicals
• Not smoking or chewing tobacco
• Reducing sun exposure, especially if you burn easily

Cancer screenings, like mammography and breast examination for breast cancer and colonoscopy for colon cancer, can help pick up these cancers at their early stages if they're most curable. Many people at high-risk for developing specific cancers can take medication to lower their threat.

More about Cancer : Symptoms, Treatment, Signs and tests