Human lung cancer is a type of cancer that develops in the tissues of the lungs. It is one of the leading causes of cancer-related deaths worldwide, and is often associated with smoking, exposure to certain chemicals or toxins, and genetic predisposition.

Lung cancer is generally divided into two main types: non-small cell lung cancer (NSCLC) and small cell lung cancer (SCLC). NSCLC is the most common type of lung cancer, accounting for about 85% of all cases. It includes several subtypes, such as adenocarcinoma, squamous cell carcinoma, and large cell carcinoma. SCLC, on the other hand, is a more aggressive form of lung cancer that tends to grow and spread more quickly than NSCLC.

The symptoms of lung cancer can vary depending on the type and stage of the disease, but may include coughing, chest pain, shortness of breath, fatigue, and unexplained weight loss. Treatment options for lung cancer include surgery, radiation therapy, chemotherapy, targeted therapy, and immunotherapy. The choice of treatment depends on several factors, including the stage and location of the cancer, as well as the patient’s overall health and other medical conditions. Early detection and treatment of lung cancer can improve the chances of survival and reduce the risk of complications.