Symptoms of lung metastasis of thymic carcinoma include symptoms of the primary tumor of thymic carcinoma, symptoms caused by lung metastasis and systemic symptoms. Lung metastasis of thymic carcinoma belongs to advanced stage cancer and the common clinical symptoms are as follows. 1. Thymic cancer tumor compresses and invades surrounding tissues, causing chest pain, chest tightness, difficulty in swallowing, difficulty in breathing, swelling of face and neck, headache, dizziness and myasthenia gravis. 2. Lung metastasis often causes irritating cough, coughing up sputum with blood, hemoptysis, chest tightness, shortness of breath, shortness of breath after activity, shoulder and back pain. 3. Systemic symptoms mainly include extreme emaciation, generalized weakness, generalized edema, fever, night sweating, etc. caused by advanced tumor consumption. Lung metastasis of thymic carcinoma suggests consulting hospitals for treatment to prolong the survival period.