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This was a patient who had known Marfan syndrome,

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and I just wanted to show you one of the complications

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that one can get with Marfan syndrome.

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If we look at the right common carotid artery,

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beginning down here in the mediastinum,

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and we follow the right common carotid artery,

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we come to the bifurcation here.

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At the bifurcation of the right common carotid artery

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into the external and internal carotid artery,

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we note a linear area of abnormal density.

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This is this little line right in the proximal

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right internal carotid artery,

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which should not be there.

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We can follow that up.

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So as we scroll upward,

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we see that this line persists within the internal

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carotid artery on the right side.

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It goes and separates it into two chrysanthic areas,

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and it persists even going up throughout into

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the petrous internal carotid artery.

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So throughout the cervical portion,

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we have that little line.

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That's an area of dissection within the blood vessel,

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which is one of the complications of Marfan syndrome

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and is an intrinsic carotid sheath pathology.