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Carotid Artery Dissection CT

I'm a 32 year old male that recently had a CT due to a dissected left carotid artery.  There were 2 comments in the radiologist's report that interested me.
1) "There is polypoid mucosal inflammation in the left maxillary antrum, consistent with multiple mucous retention cysts"
2) Note is made of hypoplastic right A1 segment

What are mucous retention cysts, where were they found, and is this of concern? Are they common?

What is hypoplastic right a1 segment?  Is it common?  Should it cause me concern?  Does this mean I have no backup flood flow in the case that the left side becomes occluded?
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623823 tn?1357416657
radiographic technical information describe a regular case of carotid artery dissection. Forget about the rest.
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Avatar universal
I now understand that the hypoplastic right a1 segment is associated with a higher risk of anneurysm.  Is there any data to estimate the increased risk?
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