Stage 3 lung cancer symptoms are variable since stage 3 includes a wide spectrum of cancers. Symptoms due to cancer in the lungs such as a persistent cough, shortness of breath, and repeated infections such as pneumonia or bronchitis, are common.
Spread to areas such as the chest wall and diaphragm can result in pain in the chest, ribs, shoulders, and back. Tumors located near the airways can cause hemoptysis (coughing up blood) and wheezing. When the tumor involves areas such as the esophagus and other chest structures, dysphagia (difficulty swallowing) and hoarseness can occur. Pain in the back, chest, and ribs is common if a pleural effusion is present, and this can result in increasing shortness of breath.