Lung shadows and lung nodules are both imaging concepts that are related but also have significant differences. Lung shadows are more extensive than lung nodules, and the borders are usually indistinct and diffuse. If the borders are relatively clear and the lesion is less than 3 cm it is usually called a pulmonary nodule.
Lung shadows are mainly areas that are found to be different in density from normal lung tissue by chest X-ray or chest CT. According to the difference in density, they are categorized into high-density shadows and low-density shadows; and according to the difference in size, they are categorized into large flaky shadows, small flaky shadows, and punctate shadows, etc. Lung nodules are usually rounded and rounded in the lungs.
Lung nodules are generally round or oval opaque shadows in the lungs with a maximum diameter of ≤3 cm. Nodules are usually found incidentally during physical examination and usually have no obvious clinical symptoms. Lung nodules can also be categorized as micro nodules, small nodules, etc. depending on their size. According to the benign or malignant nature of the nodules, they can be categorized into benign nodules and malignant nodules.
Lung shadows and lung nodules can be caused by a variety of diseases, such as lung infections, tuberculosis, tumors and so on. If you find any abnormality, it is recommended to consult a doctor in time to clarify the cause of the disease and standardize the treatment under the doctor’s guidance, so as to avoid delaying the condition.