肺癌发现就是晚期？一个方法，可降低高危人群20%死亡率→

Core Viewpoint - Lung cancer is the leading malignant tumor threatening the health of residents in China, accounting for 28% of all cancer-related deaths annually, highlighting the importance of early detection and treatment to improve survival rates [1]. Symptoms of Lung Cancer - Early identification of warning symptoms can significantly increase the chance of cure. Common symptoms include: - Persistent cough that does not improve with standard treatment [2]. - Blood in sputum, especially concerning for long-term smokers [2]. - Chest pain indicating possible tumor invasion [3]. - Difficulty in breathing due to airway obstruction [3]. - Hoarseness caused by tumor pressure on the recurrent laryngeal nerve [4]. - Unexplained fever that does not respond to antibiotics [5]. - Sudden weight loss without reason [6]. - Difficulty swallowing due to esophageal invasion [7]. - Superior vena cava syndrome presenting as swelling and congestion in the head and neck [8]. - Paraneoplastic syndromes such as clubbing of fingers, joint pain, muscle weakness, and endocrine disorders [9][10][11][12]. Prevention Methods - Early screening, diagnosis, and treatment are effective methods for lung cancer prevention. Low-dose spiral CT is recommended for high-risk groups, which can reduce lung cancer mortality by 20% [14]. Early detection can lead to a cure rate of up to 80% [15].