Solid nodules in the lungs are not necessarily cancer.
A solid lung nodule is a nodule that is so dense that it completely covers the blood vessels and bronchial tubes of the lungs, which cannot be seen in the parenchymal area of the nodule. There are many common causes of solid lung nodules, mainly inflammation of the lungs, tuberculosis infection, and early adenocarcinoma, all of which can form solid lung nodules.
Solid nodules in the lungs are only a pathologic manifestation of the lungs, and the vast majority of them are benign solid nodules. CT of malignant nodules often shows signs such as lobular sign, burr sign, vacuolar sign, air bronchial image, tumor trophoblastic arteries, vascular cuttings and set pleural depressions or pulling signs, and eccentric cavities.
When a solid lung nodule is detected, the condition should be evaluated in detail to determine the next course of management. Nodules less than 8 mm in diameter are often difficult to determine benign or malignant by diagnostic means, and it is uncertain whether they are lung cancer; regular follow-up is needed to determine this based on imaging studies.