I don't like scars. For a seasoned adventurer, they scream "I'm almost good enough to not get hurt, but just not there."
To the OP: I had one adventurer that, after clearing about 5 camps of bandits, got slashed in the leg and tore a motor nerve. That's the only non-bruise injury I ever got, and proceeded to kill 7 hydras, 3 dragons, 2 titans, and countless bandits while walking my favorite crutch: An oak crutch, menacing with spikes of platinum and encrusted in black diamond. cost me a fortune but I had 10 fortunes worth of stuff in that world. After every few quests I'd drop off my extra money in a lair about 2 tiles from the capital of the only human civ.
ANd we cant use a suturer a diagnoser and all those thing that we use in hospital in fortress mode?
no.