Thanks for your question on Health Care Magic. I can understand your situation and problem. You are having calcified mediastinal lymphnode. It is common in smokers. This suggest old, healed inflammatory process. Smokers are known to have chronic inflammation in lungs due to smoke. This leads to inflammatory enlargement of mediastinal lymphnodes. After certain time, healing take place by its own and nodes become calcified. This appear as calcified spot on chest x ray. This will remain as it is through out your life. And no treatment is required for this because it is old scar, inactive tissue. Smoking cessation should be done as soon as possible. Hope I have solved your query. Wish you good health. Thanks.