pneumonia
The right suprahilar region of the lung is located in the upper middle portion of this organ. The left lung also has a suprahilar region, but it is slightly bigger than the right.
To penetrate or get into another type of envelopment. Spies infiltrate enemy lines. Infiltrate can also be a patch of inflammation in lungs, like pneumonia in other words water and swelling infiltrates areas of lungs which are normally filled by air. Infra= below, hilum=stem of a tree, The windpipe(trachea) branches into two stems and each one enters a lung and then branches out.