What are the early symptoms of primary and secondary lung cancer

In all types of cancer, there are primary and secondary forms, and secondary cases account for a large proportion of the two, which is why the concept of precancerous lesions exists. Secondary lung cancer and other cancers are relatively complex and difficult to treat, because they are prone to cancer metastasis. Therefore, early treatment of various common diseases and early-stage primary lung cancer is very important.

Bilateral lobar lung cancer

Primary lung cancer accounts for a relatively small proportion of lung cancer cases, but across the country and in broader terms, the number of cases in which primary lung cancer can be well prevented and treated at an early stage is quite large. Cough, sputum production, and chest tightness and chest pain are symptoms throughout the course of lung cancer, and they are also manifestations of many respiratory system diseases. If a person is over 30 years old and also has shortness of breath, blood-streaked sputum or coughing up blood, shoulder and back pain, unexplained hoarseness, weight loss, frequent low-grade fever, anemia, and so on, lung cancer should be considered.

If various symptoms are endured until the body develops a "cachectic" appearance such as extreme emaciation with "withered bones and sunken flesh, fullness and gas in the chest, and difficulty breathing," then treatment will have poor prospects. For secondary lung cancer, it is necessary to seize the critical moment of "precancerous lesions" and actively and systematically treat them; most can be reversed. Many kinds of lung diseases may transform into lung cancer in their later stages, but some lung diseases are extremely likely to turn into lung cancer.

Lung anatomy

For example, pulmonary sarcoidosis is one of them. This disease also occurs mostly in people over thirty or forty years old, and it also has a familial tendency; therefore, the possibility of being prone to pulmonary sarcoidosis and of it easily transforming into lung cancer is even greater. Therefore, for people with obvious predisposing factors such as family history, they should undergo spiral CT screening at least once a year, promptly prevent and treat sarcoidosis, and block the path to transformation into lung cancer.

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