Right tube Dilated -what does that mean

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Hey ladies!
So I did my HSG test and the doc called and said "your right tube looks slightly dilated/possibly damaged" please come in to go over it. 
I'm trying not to google what that means - but sisters...what does that mean? We were going to try <a href="https://glowing.com/glow-fertility-program">IUI</a> next month after these results but not sure now if it's an option. 
Can Anyone relate? What causes this and what does this mean as far as concieving one day?