What are Lung Nodules?
Lung nodules (sometime referred to as pulmonary nodules) are usually non-cancerous (benign) growths on your lung. According to University of Rochester Medical Center, lung nodules are relatively common (for every 500 chest x-rays, 1 will usually have a lung nodule).
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Symptoms
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According to the University of Rochester Medical Center, 90 percent or more of all pulmonary nodules are discovered incidentally on a chest x-ray or CT scan which was performed for other reasons. There are often no symptoms, or symptoms may be similar to a mild flu or chest cold.
Nodule Facts
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Nodules are three centimeters in diameter or smaller. Anything larger is considered to be a mass. Small, non-cancerous nodules may not require treatment; however, if the nodule changes size or is new, your doctor will likely order additional testing.
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Diagnosis
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CT (computerized tomography) scans, PET (positron emission tomography) scans and tissue biopsies may be used to determine if the pulmonary nodule is cancerous or benign.
Significance
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According to Medline Plus, less than half of all nodules are cancerous; however, if the nodule is malignant, it is crucial that the nodule is properly diagnosed as soon as possible. Cancerous nodules often grow quickly.
Causes
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Benign pulmonary nodules are usually wounds that have healed either from a fungal infection or tuberculosis. Other causes may include hematoma, lung cysts and vascular irregularities.
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