CT results PROMINENT MEDIASTINAL AND LEFT HILAR ENLARGEMENT WITH A SMALL 9MM NODULE ALONG THE MAJOR FISSURE OF THE LEFT LUNG what does this mean?

Mediastinal and. hilar enlargement generally imply enlarged lymph nodes in those regions. There are numerous causes of enlarged lymph nodes. You need to talk to your doctor about what it means in your particular case. The 9mm nodule may or may not be related or significant.