That much in the future they should be able to grow a new hand for her. Or if they don't do that, they should be able to install a prosthetic that is linked to her nervous system. Considering that one would think the earlier the better. Although with developed technology it probably doesn't make that much of a difference but it might make her feel better not to have to stare at a stump.

If they grow her a new hand, though, then it makes sense as it can't be grown o/n.