Lung cancer is having a malignant tumor in the lungs especially in the cells lining air passages.
Primary tumor-related signs and symptoms are cough, dyspnea, hemoptysis, and chest discomfort.
Signs and symptoms due to intrathoracic spread may involve the nerves (hoarseness, dyspnea, muscle wasting of upper limb, Horner's syndrome), chest wall and pleura (chest pain, dyspnea) and vascular structures (facial swelling, dilated neck veins, cardiac tamponade) & viscera (dsyphagia).
The signs and symptoms due to metastatic spread are bone pain with or without pleuritic pain, neurologic symptoms, limb weakness, unsteady gait, cervical lymphadenopathy, and skin nodules.