标题：A mathematical prediction model - Another way to evaluate the character of SPN
作者机构：[Wang, Z] Department of Thoracic Surgery, Provincial Hospital Affiliated to Shandong University, No. 324 Jingwu Weiqi Road, 250021 Jinan, China
通讯作者地址：[Wang, Z]Shandong Univ, Prov Hosp, Dept Thorac Surg, 324 Jingwu Weiqi Rd, Jinan 250021, Peoples R China.
来源：World Journal of Surgery: Official Journal of the Societe Internationale de Chirurgie, Collegium Internationale Chirurgiae Digestivae, and of the International Association of Endocrine Surgeons
摘要：A solitary pulmonary nodule (SPN) is often discovered on a chest radiograph or chest computed tomography (CT) scan. The detection of solitary pulmonary nodules is likely to increase, especially with the release of the National Lung Screening Trials sponsored by the National Cancer Institute of the U.S. National Institutes of Health. A SPN is usually very small, located deep in the pulmonary parenchyma, and often yields atypical imaging findings. When a pulmonary nodule or mass is seen, the main consideration is whether the lesion is benign or malignant. A number of signs suggest one or the other, but it is difficult to estimate definitively the probability of malignancy. So evaluating the character of SPN is an acknowledged difficulty throughout the world, and it has become a hotspot in research in recent years.