What are the risk factors for mouth cancer

A risk factor is anything that increases that likelihood of developing a disease or condition. For example, regular smoking increases the risk of developing lung cancer; therefore smoking is a risk factor for lung cancer. The risk factors for mouth cancer include:

• Smoking - studies indicate that a 40-per-day smoker has a risk five times great than a lifetime non-smoker of developing oral cancer.


• Chewing tobacco.


• Taking snuff (snorting tobacco).


• Both heavy and regular alcohol consumption - somebody who consumes an average of 30 pints of beer per week has a risk five times greater than a teetotaler or somebody who drinks moderately.


• Heavy smoking combined with heavy drinking - as tobacco and alcohol have a synergistic effect (their combined effect is greater than each one added together separately), people who drink and also smoke a lot have a significantly higher risk of developing oral cancer compared to others. Somebody who smokes 40 cigarettes per day AND consumes an average of 30 pints of beer a week is 38 times more likely to develop oral cancer compared to other people.


• Too much sun exposure on the lips, as well as sunlamps or sunbeds.


• Diet - people who consume lots of red meat, processed meat and fried foods are more likely to develop oral cancer than others.


• GERD (gastro-esophageal reflux disease) - people with this digestive condition where acid from the stomach leaks back up through the gullet (esophagus) have a higher risk of oral cancer.


• HPV (human papillomavirus) infection.


• Prior radiation treatment (radiotherapy) in the head and/or neck area.


• Regularly chewing betel nuts - these nuts, from the betel palm tree, are popular in some parts of south east Asia. They are slightly addictive and are also carcinogenic.


• Exposure to certain chemicals - especially asbestos, sulphuric acid and formaldehyde.

lung cancer diagnosed and staged

Physicians use information revealed by symptoms as well as several other procedures in order to diagnose lung cancer. Common imaging techniques include chest X-rays, bronchoscopy (a thin tube with a camera on one end), CT scans, MRI scans, and PET scans. Physicians will also conduct a physical examination, a chest examination, and an analysis of blood in the sputum. All of these procedures are designed to detect where the tumor is located and what additional organs may be affected by it.

Although the above diagnostic techniques provided important information, extracting cancer cells and looking at them under a microscope is the only absolute way to diagnose lung cancer. This procedure is called a biopsy. If the biopsy confirms lung cancer, a pathologist will determine whether it is non-small cell lung cancer or small cell lung cancer.

After a diagnosis is made, an oncologist will determine the stage of the cancer by finding out how far the cancer has spread. The stage determines which choices will be available for treatment and informs prognosis. The most common cancer staging method is called the TNM system. T (1-4) indicates the size and direct extent of the primary tumor, N (0-3) indicates the degree to which the cancer has spread to nearby lymph nodes, and M (0-1) indicates whether the cancer has metastasized to other organs in the body. A small tumor that has not spread to lymph nodes or distant organs may be staged as (T1, N0, M0), for example.

For non-small cell lung cancer, TNM descriptions lead to a simpler categorization of stages. These stages are labeled from I to IV, where lower numbers indicate earlier stages where the cancer has spread less. More specifically:

• Stage I is when the tumor is found only in one lung and in no lymph nodes.
• Stage II is when the cancer has spread to the lymph nodes surrounding the infected lung.
• Stage IIIa is when the cancer has spread to lymph nodes around the trachea, chest wall, and diaphragm, on the same side as the infected lung.
• Stage IIIb is when the cancer has spread to lymph nodes on the other lung or in the neck.
• Stage IV is when the cancer has spread throughout the rest of the body and other parts of the lungs.

Small cell lung cancer has two stages: limited or extensive. In the limited stage, the tumor exists in one lung and in nearby lymph nodes. In the extensive stage, the tumor has infected the other lung as well as other organs in the body.

What is Lung Cancer?

Cancer is a class of diseases characterized by out-of-control cell growth, and lung cancer occurs when this uncontrolled cell growth begins in one or both lungs. Rather than developing into healthy, normal lung tissue, these abnormal cells continue dividing and form lumps or masses of tissue called tumors. Tumors interfere with the main function of the lung, which is to provide the bloodstream with oxygen to be carried to the entire body. If a tumor stays in one spot and demonstrates limited growth, it is generally considered to be benign.

More dangerous, or malignant, tumors form when the cancer cells migrate to other parts of the body through the blood or lymph system. When a tumor successfully spreads to other parts of the body and grows, invading and destroying other healthy tissues, it is said to have metastasized. This process itself is called metastasis, and the result is a more serious condition that is very difficult to treat.

Lung cancer is called "primary" if the cancer originates in the lungs and "secondary" if it originates elsewhere in the body but has metastasized to the lungs. These two types are considered different cancers from diagnostic and treatment perspectives.

In 2007, about 15% of all cancer diagnoses and 29% of all cancer deaths were due to lung cancer. It is the number one cause of death from cancer every year and the second most diagnosed after breast and prostate cancers (for women and men, respectively). Lung cancer is usually found in older persons because it develops over a long period of time.