This is a complete fracture of the left femur (thigh bone).   A callus has formed to unite the broken ends which created a shorter, but still functional bone.
 
 
 
 

The clavicle (collar bone) shown here has also healed with a callus.  It is possible that over time bone remodeling will return the clavicle to a more normal appearance.


This is a tibia (leg bone).  Since the fractured ends were not in line with one another, the new bone formation has caused the medullary cavity (space that runs down the center of the bone and contains fatty yellow bone marrow) to narrow.


All photos courtesy of Steinbock, p. 19