C34: Malignant neoplasm of bronchus and lung

Malignant neoplasms of bronchus and lung refer to a group of conditions that involve the uncontrolled and abnormal growth of cells in the bronchi (air passages leading into the lungs) and/or lung tissues. These conditions are generally categorized as lung cancers and are primarily caused by smoking, though exposure to certain hazardous substances, including radon and asbestos, can also trigger cell mutation leading to cancer. Symptoms commonly associated with these conditions include a persistent cough, chest discomfort, breathlessness, unexplained weight loss, and recurring respiratory infections. Over time, the disease can spread or 'metastasize' to other organs or systems in the body. The rate and pattern of progression can widely differ between individuals and depend on multiple factors such as type and stage of cancer at diagnosis, overall health, and timely initiation of treatment.