A lung nodule is a small growth in the lung. Lung nodules are smaller than three centimeters in diameter. A growth larger than three centimeters is called a lung mass.
Most lung nodules are benign (benign). Benign lung nodules can have a wide variety of causes, including:
In some cases, a nodule may be cancerous. Causes of malignant lung nodules include:
There are usually no symptoms associated with lung nodules. Most of the time, a patient is unaware that he or she has a lung nodule until a chest X-ray or CT scan of the lungs is done.
Lung nodules are normally detected during a chest x-ray or CT scan.
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