Solitary pulmonary nodules

Patent Granted 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[1] and around 1% of CT scans.[2] 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,[2] especially in older adults and smokers. Conversely, 10 to 20% of patients with lung cancer are diagnosed in this way.