Will my open brain heal from this?

[MikeP]

I got this brain a while ago, when I put it in the tank I noticed a large vermetid snail on the skeleton (which I removed right away). I believe it caused the tissue damage in the picture. It seems to be getting worse. Will it heal from this? Is there anything I can do to help?

Thanks



PS the half that is not shown in the picture looks good.