Thanks for your question on Healthcare Magic. I can understand your concern. First of all relax and be calm as apical pleural thickening is not a lethal or life threatening condition. Pleural thickening is suggestive of old, healed, non active scar lesions. This is mostly seen after pneumonia or tuberculosis healing. So you might be having pneumonia or tuberculosis in the past which was healed and produce this thickening. These kind of healed lesions are seen through out the life. Since they are inactive scar lesions, no treatment is required for this. So no need to worry for this apical pleural thickening. Quit smoking if you are active smoker. Hope I have solved your query. I will be happy to help you further. Wish you good health. Thanks.