4 dwarven month ago, a troll showed up in one of the underground cavern, destroyed the closed granite door i had put there to prevent entry to my fortress.
He proceeded to climb up and encountered an unfortunate Fish Cleaner in a corridor.
The Troll catched him and with his strength torn open the poor Fish Cleaner right shoulder muscle and bone, torn open the right knee and finally torn open his skull, all of those being fractured too.
Surprisingly he was always alive.
The axedwarves arrived on location as quickly as they could and managed to kill the Troll by axedeath
The poor Fish Cleaner was then carried into my nice hospital, and left to the care of the very competent chief medic (competent because i built him in the embark screen as i wouldn't really count on luck with migrant to get a decent doctor)
And now, 4 dwarven month ago, the Fish Cleaner is back in action, he has always the fracture, but he could move himself to the well to drink.
I'm sure it could have taken less time, but as i wasn't expecting anything, i have the doctor having other labors activated too, without them he surely could have worked quicker on the Fish Cleaner.
Amazing, looks like the medical system is working very good now (assuming you have a competent medical staff and hospital) , as in the past i had dwarves stuck in the hospital for nearly forever.