"Could be reviewed" My hunch is (I could very well be wrong) is she told you the decision without telling you. If she said "this may have to go to a quality review" means (I think) that you've got a positive judgement, however a review of this positive judgment may have to take place. I say this because if you are denied (which is common the first go round) there would never be a quality review in the first place, only reviews of positive judgements take place. The other thing I see in this is if it does go for a review this may hold up the process for a while, so the case worker is also telling you to be patient. When my wife got a positive judgement her lawyer stated that there is a slight chance that the judgment may go in for a review. Her advise was not worry about it at all. Reviews are common in SS cases, I wouldn't worry about it or take it personal.

Others, please chime in if there is important info I'm missing.