1 INTRODUCTION Solitary pulmonary nodules (SPNs) are defined as a single nodule with a diameter <3 cm, round or oval shadows, clear or unclear boundaries, completely surrounded by normal lung parenchyma, and accompanied by no other abnormalities in the lung.1 While the majority are benign, around 35% are primary malignant tumors.2 When SPNs constitute the early manifestation of lung cancer, timely detection and appropriate treatment produces the highest cure rate, resulting in a 5-year...
