Cancer occurs when normal cells undergo a transformation that causes them to grow and multiply without control. The cells form a mass or tumor that differs from the surrounding tissues from which it arises. Tumors are dangerous because they take oxygen, nutrients, and space from healthy cells and because they invade and destroy or reduce the ability of normal tissues to function.
Lung cancer is the leading cause of cancer deaths in the United States, among both men and women. It claims more lives each year than colon, prostate, lymph and breast cancers combined.
Yet most lung cancer deaths could be prevented. That's because smoking accounts for nearly 90 percent of lung cancer cases. Your risk of lung cancer increases with the length of time and number of cigarettes you smoke. If you quit smoking, even after smoking for many years, you can significantly reduce your chances of developing lung cancer. Protecting yourself from other risk factors for lung cancer, such as exposure to asbestos, radon and secondhand smoke, also decreases your risk.
Symptoms of Lung Cancer
Lung cancer typically doesn't cause signs and symptoms in its earliest stages. Signs and symptoms of lung cancer typically occur only when the disease is advanced.
Signs and symptoms of lung cancer may include:
Lung cancer most commonly begins in the cells that line your lungs. Smoking causes the majority of lung cancers both in smokers and in people exposed to secondhand smoke. But lung cancer also occurs in people who never smoked. In these cases, there may be no clear cause of lung cancer. Doctors have identified factors that may increase the risk.
How smoking causes lung cancer
Doctors believe smoking causes lung cancer by damaging the cells that line the lungs.When you inhale cigarette smoke, which is full of cancer-causing substances (carcinogens), changes in the lung tissue begin almost immediately. At first your body may be able to repair this damage. But with each repeated exposure, normal cells that line your lungs are increasingly damaged. Over time, the damage causes cells to act
abnormally and eventually cancer may develop.
Your lungs are full of blood vessels and lymph vessels, giving lung cancer cells easy access to travel to other parts of your body. For this reason, lung cancer may spread to other parts of your body before you experience any signs or symptoms. In many cases, lung cancer may spread before it can even be detected in the lungs.
Types of lung cancer
Doctors divide lung cancer into two major types based on the appearance of lung cancer cells under the microscope. Your doctor makes treatment decisions based on which major type of lung cancer you have. The two general types of lung cancerinclude:
Small cell lung cancer. Small cell lung cancer, sometimes called oat cell carcinoma, occurs almost exclusively in heavy smokers and is less common than non-small cell lung cancer.
Non-small cell lung cancer. Non-small cell lung cancer is an umbrella term for several types of lung cancers that behave in a similar way. Non-small cell lung cancers include squamous cell carcinoma, adenocarcinoma and large cell carcinoma
Dignosis of Lung Cancer
The most widely used therapies for lung cancer are surgery, chemotherapy, and radiation therapy
Prevention from Lung Cancer
There's no sure way to prevent lung cancer, but you can reduce your risk if you:
Don't smoke. If you've never smoked, don't start. Talk to your children about not smoking, so they can understand how to avoid this major risk factor for lung cancer. Many current smokers began smoking in their teens. Begin conversations about the dangers of smoking with your children early, so they know how to react to peer pressure.
Stop smoking. Stop smoking now. Quitting reduces your risk of lung cancer,even if you've smoked for years. Talk to your doctor about strategies and stop smoking aids that can help you quit. Options include nicotine replacement products, medications and support groups.
Avoid secondhand smoke. If you live or work with a smoker, urge him or her to quit. At the very least, ask him or her to smoke outside. Avoid areas where people smoke, such as bars and restaurants, and seek out smoke-free ptions.
Test your home for radon. Have the radon levels in your home checked,especially if you live in an area where radon is known to be a problem. High radon levels can be remedied to make your home safer. For information on radon testing, contact your local department of public health or a local chapter of the American Lung Association.
Avoid carcinogens at work. Take precautions to protect yourself from exposure to toxic chemicals at work. In the United States, your employer must tell you if you're exposed to dangerous chemicals in your workplace. Follow your employer's precautions. For instance, if you're given a face mask for protection, always wear it. Ask your doctor what more you can do to protect yourself at work. Your risk of lung damage from these carcinogens increases if you smoke.
Eat a diet full of fruits and vegetables. Choose a healthy diet with a variety of fruits and vegetables. Food sources of vitamins and nutrients are best.
Avoid taking large doses of vitamins in pill form, as there may be unknown harms. For instance, researchers hoping to reduce the risk of lung cancer in heavy smokers gave them beta carotene supplements. Results showed the
supplements actually increased the risk of cancer in smokers.
Drink alcohol in moderation, if at all. Limit yourself to one drink a day if you're a woman or two drinks a day if you're a man. Anyone age 65 and older should drink no more than one drink a day.
Exercise. Aim to achieve at least 30 minutes of exercise on most days of the week. Check with your doctor first if you aren't already exercising regularly.
Start out slowly and continue adding more activity. Biking, swimming and walking are good choices. Add exercise throughout your day — park farther away from work and walk the rest of the way or take the stairs rather than the elevator.
About 40,000 people in the UK die every year from lung cancer. It is the most common form of cancer in the UK and the most common cause of death from cancer in both men and women although it affects more men than women.
Lung cancer is the leading cause of cancer deaths in the United States, among both men and women. It claims more lives each year than colon, prostate, lymph and breast cancers combined.
Yet most lung cancer deaths could be prevented. That's because smoking accounts for nearly 90 percent of lung cancer cases. Your risk of lung cancer increases with the length of time and number of cigarettes you smoke. If you quit smoking, even after smoking for many years, you can significantly reduce your chances of developing lung cancer. Protecting yourself from other risk factors for lung cancer, such as exposure to asbestos, radon and secondhand smoke, also decreases your risk.
Symptoms of Lung Cancer
Lung cancer typically doesn't cause signs and symptoms in its earliest stages. Signs and symptoms of lung cancer typically occur only when the disease is advanced.
Signs and symptoms of lung cancer may include:
- Hoarseness
- Losing weight
- Bone pain
- Headache
- A new cough that doesn't go away
- Changes in a chronic cough or "smoker's cough"
- Coughing up blood, even a small amount
- Shortness of breath
- Chest pain
- Wheezing
Lung cancer most commonly begins in the cells that line your lungs. Smoking causes the majority of lung cancers both in smokers and in people exposed to secondhand smoke. But lung cancer also occurs in people who never smoked. In these cases, there may be no clear cause of lung cancer. Doctors have identified factors that may increase the risk.
How smoking causes lung cancer
Doctors believe smoking causes lung cancer by damaging the cells that line the lungs.When you inhale cigarette smoke, which is full of cancer-causing substances (carcinogens), changes in the lung tissue begin almost immediately. At first your body may be able to repair this damage. But with each repeated exposure, normal cells that line your lungs are increasingly damaged. Over time, the damage causes cells to act
abnormally and eventually cancer may develop.
Your lungs are full of blood vessels and lymph vessels, giving lung cancer cells easy access to travel to other parts of your body. For this reason, lung cancer may spread to other parts of your body before you experience any signs or symptoms. In many cases, lung cancer may spread before it can even be detected in the lungs.
Types of lung cancer
Doctors divide lung cancer into two major types based on the appearance of lung cancer cells under the microscope. Your doctor makes treatment decisions based on which major type of lung cancer you have. The two general types of lung cancerinclude:
Small cell lung cancer. Small cell lung cancer, sometimes called oat cell carcinoma, occurs almost exclusively in heavy smokers and is less common than non-small cell lung cancer.
Non-small cell lung cancer. Non-small cell lung cancer is an umbrella term for several types of lung cancers that behave in a similar way. Non-small cell lung cancers include squamous cell carcinoma, adenocarcinoma and large cell carcinoma
Dignosis of Lung Cancer
- Pulmonary function tests assess breathing capacity.
- Blood tests are performed to identify any chemical imbalances, blood disorders, or other problems that might complicate treatment.
- CT scans or MRIs may be performed on the most common areas of spread to check for metastatic disease. These tests are generally performed only if symptoms occur that suggest metastatic disease. Certain treatment protocols require that these tests be performed.
The most widely used therapies for lung cancer are surgery, chemotherapy, and radiation therapy
Prevention from Lung Cancer
There's no sure way to prevent lung cancer, but you can reduce your risk if you:
Don't smoke. If you've never smoked, don't start. Talk to your children about not smoking, so they can understand how to avoid this major risk factor for lung cancer. Many current smokers began smoking in their teens. Begin conversations about the dangers of smoking with your children early, so they know how to react to peer pressure.
Stop smoking. Stop smoking now. Quitting reduces your risk of lung cancer,even if you've smoked for years. Talk to your doctor about strategies and stop smoking aids that can help you quit. Options include nicotine replacement products, medications and support groups.
Avoid secondhand smoke. If you live or work with a smoker, urge him or her to quit. At the very least, ask him or her to smoke outside. Avoid areas where people smoke, such as bars and restaurants, and seek out smoke-free ptions.
Test your home for radon. Have the radon levels in your home checked,especially if you live in an area where radon is known to be a problem. High radon levels can be remedied to make your home safer. For information on radon testing, contact your local department of public health or a local chapter of the American Lung Association.
Avoid carcinogens at work. Take precautions to protect yourself from exposure to toxic chemicals at work. In the United States, your employer must tell you if you're exposed to dangerous chemicals in your workplace. Follow your employer's precautions. For instance, if you're given a face mask for protection, always wear it. Ask your doctor what more you can do to protect yourself at work. Your risk of lung damage from these carcinogens increases if you smoke.
Eat a diet full of fruits and vegetables. Choose a healthy diet with a variety of fruits and vegetables. Food sources of vitamins and nutrients are best.
Avoid taking large doses of vitamins in pill form, as there may be unknown harms. For instance, researchers hoping to reduce the risk of lung cancer in heavy smokers gave them beta carotene supplements. Results showed the
supplements actually increased the risk of cancer in smokers.
Drink alcohol in moderation, if at all. Limit yourself to one drink a day if you're a woman or two drinks a day if you're a man. Anyone age 65 and older should drink no more than one drink a day.
Exercise. Aim to achieve at least 30 minutes of exercise on most days of the week. Check with your doctor first if you aren't already exercising regularly.
Start out slowly and continue adding more activity. Biking, swimming and walking are good choices. Add exercise throughout your day — park farther away from work and walk the rest of the way or take the stairs rather than the elevator.
About 40,000 people in the UK die every year from lung cancer. It is the most common form of cancer in the UK and the most common cause of death from cancer in both men and women although it affects more men than women.
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Unknown - Monday, 25 July 2011
