LUNG

The hilum is located on the medial aspect of each lung and provides the only route via which other structures enter and exit the lung. The hilum also serves as the point of attachment for the lung root and is the point at which the visceral and parietal pleura connect.

The hilum is a large triangular depression located superior to the centre of the lung’s mediastinal surface and posterior to the cardiac impression. Anteriorly, the hilum corresponds to the 4-5th costal cartilages and posteriorly to T5-T7.