Tags: Disease.
In radiology a solitary pulmonary nodule (SPN) or coin lesion is a mass in the lung smaller than 3 centimeters in diameter. It can be an incidental finding found in up to 0.2% of chest X-rays and around 1% of CT scans.The nodule most commonly represents a benign tumor such as a granuloma or hamartoma but in around 20% of cases it represents a malignant cancer especially in older adults and smokers. Conversely 10 to 20% of patients with lung cancer are diagnosed in this way.
