I only have a couple jades, but I think I might do the wait and see thing too. It could just keep on living like that. It would be an interesting look when I first saw it it reminded me of this:)....

Is that the tree that used to be in Vancouver's Stanley Park, Kara?

No it's California grown;). It's from Calaveres Big Trees State Park. It was carved out in the 1880's. Sadly this winter it fell because of all the rain we received. Sad:(.

I would chop it; search healthy stem and reroot.

I would Also pot it with less of a lip above the dirt. I think that give reason for the fungus and rot to start.

Mara, this plant has been in the same pot for close to ten years. Not certain what caused the initial injury.

I would wait and see. If it starts to rot then cut it. I see little need to act now, if at all

If it was a big Silver Maple tree outside your greenhouse. I would most diffidently cut it down. But being a old jade plant. Leave it alone. It gives it character.

I picture a little lady bug family living in there. Driving their little lady bug cars, and living in their tiny ladybug houses. I have ladybugs on my mind:) I just bought a couple containers yesterday at a nursery.

Can't believe you stuck your finger in there.

Leave it. If it does not collapse, it will only become more venerable and impressive in its old age.

How big is the cavity, Howard?

Kara, I'm impatient for ladybugs! I think I need two more weeks of stable night temps over 10C which we're not even getting yet.

You could cover the surfaces with sulfur and create a jin.

Newb question here...but isn't it time to repot? Could something be originating from the soil?

Leave it alone, same soil and all. It was an attack some time ago and the plant healed itself. If growing well and it looks like it is, I say leave it. If it was a rare valuable plant then take cuttings and propagate it.