肺癌早期难以察觉，出现这些症状要警惕！医生提醒→

Core Points - The article emphasizes the importance of early screening and standardized clinical diagnosis for lung cancer, which is the most prevalent and deadly malignant tumor in China [1] - It highlights the typical symptoms of early-stage lung cancer and identifies high-risk groups [2] Group 1: Lung Cancer Overview - Lung cancer originates from bronchial mucosa or glands and is mainly classified into small cell lung cancer (SCLC) and non-small cell lung cancer (NSCLC), with NSCLC being more common and having a relatively better prognosis [1] - Early-stage lung cancer often presents with subtle symptoms, making it difficult to detect [1] Group 2: Symptoms and Detection - Typical symptoms of lung cancer include persistent cough, sputum production, blood-streaked sputum, and dry cough without phlegm, which may not respond to common cough medications [1] - Atypical symptoms such as hoarseness, back pain, or leg pain may indicate lung cancer with bone metastasis, particularly in cases of small cell lung cancer [1] Group 3: High-Risk Groups - Individuals aged 50 to 80 years are considered high-risk for lung cancer, with smoking history being a significant risk factor, particularly for those with a smoking history of 20 pack-years [2] - Other risk factors include pre-existing lung conditions like chronic obstructive pulmonary disease (COPD) or tuberculosis, exposure to secondhand smoke, and occupational hazards involving asbestos, dust, and metal particles [2] - Family history of lung cancer also increases the likelihood of developing the disease [2]