Learning Issues:

1. Review normal anatomy of the normal canine stifle.
2. Significance of cranial drawer sign.  Is an indication of cranial cruciate ligament rupture.  It is noted that the orthopedic exam must be repeated under sedation to accurately diagnose the drawer movement.
3. Is there any breed/signalment associated with this condition?  Large breed active overweight dogs may be predisposed.
4. Radiographic signs of this condition. Increased fluid in the stifle joint as well as medial buttressing. 
5. Most common bacteria associated with traumatic infectious arthritis. (C. pyogenes, Clostridium spp., Strept. And Staph)