Lung cancer, X-ray. Frontal view of a chest X-ray of a 62-year-old female patient with adenocarcinoma of the right lung. A malignant (cancerous) tumour (opaque round mass, white) is seen in the upper right lung (left). Adenocarcinomas arise from the glandular lining (epithelium) of the lung. Symptoms of lung cancer include chest pain, shortness of breath and a cough. Treatment is with a combination of chemotherapy and radiotherapy.