Are Hilus and Hilum the Same Thing?

In human anatomy, the hilum (/ˈhaɪləm/; plural hila), sometimes formerly called a hilus (/ˈhaɪləs/; plural hili), is a depression or fissure where structures such as blood vessels and nerves enter an organ.

What is the hilus?

The hilus is the point of entry and exit of the renal arteries and veins, lymphatic vessels, nerves, and the enlarged upper extension of the ureters.

Is hilum part of mediastinum?

…with the mediastinum at the hilum, a circumscribed area where airways, blood and lymphatic vessels, and nerves enter or leave the lungs. The inside of the thoracic cavities and the lung surface are covered with serous membranes, respectively the parietal pleura and the visceral pleura, which are in direct continuity…