hilum of lung

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hi·lum of lung

1. a wedge-shaped depression on the mediastinal surface of each lung, where the bronchus, blood vessels, nerves, and lymphatics enter or leave the viscus.
2. radiologically, the composite shadow of the main pulmonary arteries, veins, and lymph nodes in the lung root adjacent to the anatomic hilum.
Synonym(s): hilum pulmonis [TA], porta pulmonis
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