Solitary Pulmonary Nodule

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SPN Overview


A solitary pulmonary nodule (SPN) is a small, round or egg-shaped lesion (abnormal tissue) in the lungs. SPNs are typically asymptomatic, and they are usually noticed by chance on a chest x-ray that has been done for another reason. They are usually less than 3-4 cm in diameter (no larger than 6 cm) and are always surrounded by normal, functioning lung tissue.


SPNs are fairly common abnormalities on chest x-ray images: nearly one of every 500 chest x-rays shows a ne...Read the full article