As everyone has already stated its because she was recovering from the Pain attack. They didnt think she was going to survive.
Oooo, okie. Got it now. Yes that does explain things...
...but they seriously would had let Danzo represent them?
Aaand side note question:
Who WOULD had been beside Tsunade protecting her...
...and we never got too see what Danzo's dogs were capae of, did we...
No didn't see what the were truly capable of. Tsunade probably would've taken Shizune and Kakashi or Sakura![]()