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Blood in thyroid nodule

I recently had my 4 cm thyroid nodule looked at by a general surgeon and he said it was concerning because it was "vascular" -which I know had to do with blood, but I don't totally understand what that means.  I'm having a hard time finding any info on that - do you have an explanation?
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The nodule with blood supply is composed from the living tisue (as opposed to the nodule composed from scar-like dead tissue). If that nodule is not taking up iodine (cold) it means increased chance for malignancy up to 20%.
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393685 tn?1425812522
vascular meaning high movement and would have blood as the energy to make it move.

It could mean you have a hot nodule which is producing hormone w. cystic a-typical structure
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