| A laparotomy revealed an unresectable tumor encasing the hepatic arteries, portal vein, and common bile duct in the hepatic hilus. |
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| At the center of the concave side, where the ureters and veins issue and arterial vessels and nerves usually enter, is the hilus. |
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| The arteries enter at the hilus and are carried in, and branch with, the trabeculae. |
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| The hepatic artery, portal vein, lymphatics, and nerves enter the liver through the hilus. |
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| In the medulla, note the elongated gray olivary nucleus, with its slit-like hilus, directed dorsomedially. |
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| It was partially cavitary in the midportion of the specimen and extended into the hilus and renal vein. |
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| Renal hilus and internal fats removed or retained. |
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