Panosteitis

Canine panosteitis is a random, spontaneously occurring, and self-limiting disease of generally young, large breed dogs and that affects of the long bones (legs). Affected animals usually experience obscure, intermittent lameness affecting one or more limbs.

Panosteitis in Young Dogs
http://www.peteducation.com/article.cfm?c=2+1561&aid=466

Panosteitis
http://en.wikipedia.org/wiki/Panosteitis

Panosteitis
http://www.critterchat.net/pano.htm

CHAPTER 49: CANINE PANOSTEITIS
http://cal.vet.upenn.edu/projects/saortho/chapter_49/49mast.htm