What does bilateral hilar shadow mean?

Bilateral hilar shadow is not large refers to the chest X-ray or CT examination, bilateral hilar shadow is normal, belongs to the normal imaging description. Bilateral hilar is composed of trachea, bronchus, pulmonary artery, pulmonary vein blood vessel, pulmonary lymph vessel, they meet in the hilar. Therefore, under the lung imaging examination, the hilar shadow is enlarged. It is necessary to consider whether the above several anatomies are caused by diseases, such as pulmonary nodules and lung tumors, which will cause thickening and thickening of hilar shadow. Inflammation of lung, heart failure and pulmonary edema will also cause exudation shadow in hilar lung. It is better to do enhanced CT examination of chest for differential diagnosis.