What is the difference between pneumoconiosis and lung cancer

Pneumoconiosis and lung cancer in the pathogenesis, symptoms and other aspects, in fact, there are differences, such as pneumoconiosis, dust and dust deposited in the alveoli resulting in pulmonary fibrosis, there is a long process of formation. Lung cancer, on the other hand, is the evolution of various lung diseases into malignant tumors. Pneumoconiosis is non-metastatic, while malignant tumors will metastasize, and pneumoconiosis may also evolve into lung cancer, but lung cancer is decay and the ultimate destination of the disease.

Symptoms such as cough, expectoration, chest pain, dyspnea, hemoptysis, etc. may occur in the early and middle stages of pneumoconiosis or complicated with other diseases. To severe and late stage, symptoms such as edema, hoarseness and shortness of breath can be increased. In the early stage of lung cancer, there will be symptoms such as cough, low fever, chest pain, phlegm and blood, and the late stage mainly refers to the increased symptoms after metastasis to other organs or systems.

Small round shadow

In chest X-ray and other examinations, pneumoconiosis and lung cancer are also different, such as typical silicotic pneumoconiosis, the initial two lung fields have basically symmetrical small round shadows, and the outside is obvious. Generally do not accumulate the tip of the lung, if the tip of the lung appeared shadow, mostly pneumoconiosis with tuberculosis. Small round shadows in the development will also appear in the middle and lower lung fields, and the shadows will increase, enlarge and increase in intensity. When pneumoconiosis complications develop to a severe stage, dense snowy shadows can fill both lungs, and lung textures can be interrupted or illegible.

Lung tumor, that is, lung cancer, generally has three types: central type, peripheral type and diffuse type. On chest X-ray, except that diffuse type is easy to be confused with pneumoconiosis, central type and peripheral type are obviously distinguished from pneumoconiosis. In typical central lung cancer, a mass on the hilum protrudes into the lungs. In the later severe stage, the mass will include metastatic lymph nodes and may be associated with obstructive pneumonia and atelectasis.

Round nodules of lung cancer

The chest X-ray films of peripheral lung cancer are mostly quasi-round, with nodules or masses in the lungs, lobulated or small burr at the edge, and no calcification; the diffuse type occurs in the canceration of bronchoalveolar cells, so extensive nodules or infiltrative lesions are formed in both lungs. Conclusion the saving 1~5mm is large, and the density of distribution is uniform, the outline is clear, and there is a tendency of fusion, but it is often asymmetric and some lesions are dense. CT examination can reveal low-density malignant tumors hidden near the heart and spine.

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