Board Thread:Naruto Discussions/@comment-26636534-20151016181609/@comment-24757127-20151016204450

LanceR 97 wrote: Well, seems like there's some kind of definition of those physical injuries, which are ignored when reanimating a person, and those, which are not ignored. For example, ET Nagato maintained his crippled legs and exhausted body, but at the same time terminally ill Itachi, who died exacly from this, was totally okay in ET form and even didn't demonstrate any typical side effects of continious MS use.

Good point! I was going to put that edo tensei's body repair itself but that is not true with Nagato. Guess they wanted to show Nagato regaining the use of his legs so overlooked that in comparison to other resurrected shinobi.