It's a little blown out in the leg/foot area, though that's sometimes hard to control with dappled light. Nice pose. It looks like that hurt unless it was staged. The clipped body parts is unfortunate. The left foot actually stands out more than the clipped head.
You probably tried to focus on her injury to make the message more clear. However I think, it is clear enough, instead with people portraits it is always better to focus on their eyes. The idea is very good, picture tells a story, wakes up emotions (the first thought is "poor girl"). I would just try to focus on her eyes, instead of knee.
What a weird picture. To weird to be staged I would think. Right foot and Left ankle seem blown out to me. I suppose this is why exposure is tricky with this kind of lighting situation.