As you know, lung cancer is a serious disease that's generally the result of smoking. However, even non-smokers are at risk. That's because lung cancer can result from a lifetime of exposure to many things all around us.
In fact, there are lots of other causes that would also make doctors look at, or screen, people more closely because they may be at risk. After a screening, some people may need to undergo more tests. This helps the healthcare team make the correct diagnosis and know which treatment approach is best for you.
Approximately 400,000 people have lung cancer in the US.
Over 221,000 new cases may be diagnosed in 2015.
People may be at risk of lung cancer depending on their type of industry or workplace, such as mines, mills, or some textile plants.
Some other causes of cancer include
Fortunately, there have been updated regulations and policies to protect workers and improve safety in the workplace. If you work in this type of environment, it's always a good idea to have routine check-ups with your doctor.
The Centers for Disease Control and Prevention (CDC) have guidelines that make it easier to determine who should be screened based on their risk of lung cancer. But every case of lung cancer is unique, so symptoms may vary from patient to patient. What's more, by the time symptoms are noticed, the lung cancer may be in an advanced stage. To learn more about how lung cancer progresses, please see the section "Staging lung cancer."
When lung cancer is found early, it's often found by chance. A person may be treated for another condition, or having a routine procedure, when the doctor may notice something unusual on a chest x-ray or other diagnostic test. When lung cancer is diagnosed this early, there are more treatment options.
Lung cancer symptoms seen may include, but are not limited to:
Always see your doctor if you have any concerns. They will know how to help guide you through the next steps.
A screening is when a doctor looks for signs of lung cancer before any symptoms appear. If cancer is discovered early, there are more options for treatment as well as a better outlook. At the moment, there's only one test that's recommended for lung cancer screening. It's called a low-dose computed tomography (LDCT). An x-ray machine uses small amounts of radiation to create detailed scans of the lungs.
The CDC has guidelines in place to help doctors determine who may be at risk. These include people who:
According to the CDC, heavy smoking means that the person has smoked a pack of cigarettes a day for a year for 30 years or two packs of cigarettes a day for 15 years. If a person meets these guidelines, a lung cancer screening test should probably be done.
If a screening shows something that doesn't look right, the healthcare team will do more tests to investigate. This way, the team can make a more accurate diagnosis and, if need be, get treatment started. Some diagnostic tests are:
Here, mucus (or sputum) is coughed up from the lungs. Then some of it is put under a microscope to see if there are any abnormal cells. This test is useful for finding tumors that may be growing in the airways of the lungs.
Also called a CAT scan, this test is like having an x-ray. It lasts a little bit longer because it takes lots of pictures from many different angles. The CT scanner does this by moving in a circular motion around the body as the person lies still on a table. The person being tested usually needs to have a contrast solution (a mixture that helps create detailed images of the lungs and other soft tissues like lymph nodes) in their body first. The doctor will decide whether they drink it or if it goes into their body through a vein. Doctors get a lot of important information from this test such as where and how big the cancer is.
For an even closer examination of the abnormal growth, a small sample is removed by either: a needle; a long thin tube; or surgery. This way, doctors can view it under a microscope.
Mutation tests (also known as molecular profiling) are very specific and look for certain changes in a person's cancer genes. In these cases, your treatment team takes a small piece of the cancer and runs tests on it to see if a targeted drug therapy could be effective in fighting the specific cancer cells. Note that not all cancers will be right for this type of treatment.
Healthcare teams have several options in diagnosing lung cancer, but often use one of two ways, invasive or non-invasive.