Everything turns to callus eventually.

You have the most beautiful callus.

- yeah, that's okay. You'll form a callus.

The devout develop a callus. Ziva.

The soft callus hasn't consolidated yet.

The soft callus hasn't consolidated yet.

Man, look at all this callus formation.

- I got a callus on this one right here. - Help!

I get paid shit, but I callus and stand.

Except the remodeled bone has formed a hard callus over the older fracture.