What Is Metastatic Lung Cancer?
When cancer develops, it typically forms in one area or organ of
the body. This area is known as the primary site. Unlike other cells in the
body, cancer cells can break away from the primary site and travel to other
parts of the body.
Cancer cells can move in the body through the bloodstream or
the lymph system. The lymph
system is made up of vessels that carry fluids and support the immune system.
When cancer cells travel to other organs in the body, it’s called metastasis.
Metastatic lung cancer is a life-threatening condition that
develops when cancer in another area of the body metastasizes, or spreads, to
the lung. Cancer that develops at any primary site can form metastatic tumors.
These tumors are capable of metastasizing to the lungs. Primary tumors that
commonly spread to the lungs include:
What Are the Symptoms of Metastatic Lung Cancer?
Metastatic lung cancer doesn’t always cause symptoms. When
symptoms do develop, they can be difficult to identify. This is because the
symptoms may be similar to health conditions other than cancer.
The symptoms of metastatic lung cancer can include:
- a persistent cough
- coughing up blood or bloody phlegm
- chest pain
- shortness of breath
- sudden weight loss
How Does Metastatic Lung Cancer Develop?
For cancer cells to metastasize, they must go through several
changes. First, the cells have to break away from the primary site and find a
way to enter the bloodstream or lymph system. Once they’re in the bloodstream
or lymph system, the cancer cells must attach themselves to a vessel that will
allow them to move to a new organ. In the case of metastatic lung cancer, the
cancer cells travel to the lungs.
When the cells arrive at the lung, they’ll need to change again
in order to grow in the new location. The cells must also be able to survive
attacks from the immune system. All of these changes make metastatic cancer
different from the primary cancer. This means that people can have two
different types of cancer, making treatment more difficult.
How Is Metastatic Lung Cancer Diagnosed?
Your doctor will perform a physical exam and order various
diagnostic tests if metastatic lung cancer is suspected.
Diagnosis of metastatic lung cancer can be confirmed through the
- a chest X-ray, which creates detailed images of
- a CT scan,
which produces clear, cross-sectional pictures of the lung
- a lung
needle biopsy, which allows your doctor to remove a small sample of lung
tissue for analysis
- a bronchoscopy,
which allows your doctor to directly visualize all the structures that make up
your respiratory system, including the lungs
How Is Metastatic Lung Cancer Treated?
The goal of treatment is to control the growth of the cancer or
to relieve any symptoms. There are numerous different treatments available, and
your specific treatment plan will depend on various factors, including:
- your age
- your overall health
- your medical history
- the type of primary tumor
- the location of the tumor
- the size of the tumor
- the number of tumors
is often used to treat metastatic lung cancer. This is an aggressive form of
chemical drug therapy that helps destroy cancerous cells in the body. It’s the
preferred treatment option when the cancer is more advanced and has spread to
other organs in the body.
In some cases, surgery may also be performed to remove the
metastatic tumors in the lung. This is usually done if someone already had
their primary tumor removed or if the cancer has only spread to limited areas
of the lung.
Other treatments that may be recommended by your doctor include:
therapy, which uses high-energy radiation to shrink tumors and kill cancer
- laser therapy, which
uses high-intensity light to destroy tumors and cancer cells
- the placement of stents, or tiny tubes, in the
airways to keep them open
Experimental treatments for metastatic lung cancer are also
available. Heat probes can be used to destroy cancer cells in the lungs. Chemotherapy
drugs may also be applied directly to the affected area of the lung containing
the metastatic tumor.
What Is the Long-Term Outlook for People
with Metastatic Lung Cancer?
Your long-term outlook will depend on the size and location of
your primary tumor. It will also depend on how much the cancer has spread. Certain
cancers that metastasize to the lungs can be very treatable with chemotherapy.
Primary tumors in the kidney, colon, or bladder that metastasize to the lungs may
sometimes be completely removed with surgery.
In most cases, metastatic lung cancer can’t be cured. However,
treatments may help prolong your life and improve the quality of your life.
How Can Metastatic Lung Cancer Be Prevented?
It’s very difficult to prevent metastatic lung cancer.
Researchers are working on preventive treatments, but nothing is common
practice yet. One step toward preventing metastatic cancer is prompt and
successful treatment of your primary cancer.
Coping with Metastatic Lung Cancer
It’s important to have a strong support network that can help you
deal with any stress and anxiety you may be feeling if you have a diagnosis of
metastatic lung cancer. You may want to speak with a counselor or join a cancer
support group where you can discuss your concerns with others who can relate to
what you’re going through. Ask your doctor about support groups in your area.
You can also find information on support groups on the National
Cancer Institute and the American
Cancer Society websites.