Lung nodules include calcified foci. Lung nodules are the result of inflammatory growths, tumors, or calcification. Whereas most calcified foci are dense nodules formed by advanced inflammation mechanization, some calcified foci may be lung cancer. Lung nodules are space-occupying lesions in the lungs that may be inflammatory proliferations, such as tuberculosis. They may also be various benign and malignant tumors of the lungs, such as adenomas, squamous carcinomas, and metastatic carcinomas, or they may be calcified foci. And calcified foci are usually a type of lung nodule formed by the advanced mechanization of inflammation, for example, in the advanced stage of tuberculosis, tuberculous calcified foci will be formed. In addition, some lung cancers also form calcified foci. Thus, the difference between the two is that the lung nodules are more extensive, of which the calcified foci are a type.