Sorry, by ripped I meant like an aged rip (nip/tear/ chunk removal by predator....) it received in the wild, not a fresh rip that would still be tattered. But yeah eventho the pic is a little "off" it does still look like a fairly well healed injury, and an older one (or deformation). All in all I would say it is a nice looking juvi angel, I do like the more yellow queens personally so to me its a good score even with the possible deformation..... which it is still young so who knows if it will stay like that, but likely it will not fully correct itself IMO.
I wouldn't think you should have any special issues with that area, but angels are prone to flukes. Also, what size tank do you have it in as they do get fairly big and quite aggressive.