Small cell lung cancer (SCLC) is a type of lung cancer that is characterized by the rapid growth of malignant cells in the lungs. It is an aggressive form of cancer that is usually found in the central part of the lungs. SCLC is often caused by smoking and is more common in men than women. Symptoms of SCLC include coughing, chest pain, shortness of breath, and weight loss. Treatment for SCLC typically involves chemotherapy and radiation therapy.