What Is It?
Squamous cell carcinoma of the lung is a type of lung cancer. It occurs when abnormal lung cells multiply out of control and form a tumor. Eventually, tumor cells can spread (metastasize) to other parts of the body including the
In general, there are two categories of lung cancer: small cell lung cancer and non-small cell lung cancer. The cancer cells in each type look different under the microscope. They are also treated differently. The prognosis for non-small cell lung cancer tends to be better than for small cell lung cancer; non-small cell lung cancers are more likely to be contained in one area, making treatment more likely to be successful.
Squamous cell carcinoma is one type of non-small cell lung cancer. The others are
Adenocarcinoma is the most common type of lung cancer. Squamous cell carcinoma is the second-most common type. It accounts for about 30% of all cases of non-small cell lung caner.
Your risk of all types of lung cancer, including squamous cell carcinoma, increase if you
Most cases of squamous cell carcinoma start in the center of the lungs. These tumors may cause some symptoms, such as coughing up blood, at an earlier stage than tumors on the edges of the lungs, such as adenocarcinomas.
Squamous cell carcinoma often spreads (metastasizes) to other parts of the body because of the constant flow of fluids (blood and lymph) through the lungs. The fluids can carry cancer cells to nearby areas, such as the chest wall, neck, esophagus, and the protective sac around the heart. Unless it is diagnosed and treated early, it often spreads throughout the body.
Many lung cancers have the ability to secrete chemicals that circulate in the bloodstream. These chemicals can change the way the body functions. Squamous cell lung cancer may secrete a substance that leads to abnormal calcium levels. This can cause kidney problems.
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