3 year old pomeranian
Vaccinated regularly
On Heartworm preventative
Dewormed two months prior
Has allergies treated with benadryl 
Indoor dog 
One other dog lives in the household.
Fed one small can of food for dinner per day
All of the above facts are important because they are the dog's signalment and history.  By understanding the dog's vaccine, deworming and heartworm schedule, some diseases and other problems can be ruled out.  The dog's breed and size do presidpose him to certain congenital problems.

The dog is suffering from an intermittent lameness in the right hind limb.
This is pertinent because it is the dog's chief complaint and the problem that we are trying to diagnose and possibly cure.

Fell off bed a year ago creating a weight bearing lameness on the right hind limb.  This injury became normal within a month
This history is important because the injury was on the same limb as the current problem.  It is possible that they could be related and the trauma from the initial fall could be the cause of Titan's current problem.

6 months later there was a mild right hind limb lameness treated with an antiinflammatory with no affect.
Lameness has not progressed
This information is important because we know that the lameness is not progressing further.  We also know that palliative treatment with an antiinflammatory will not be successful.

Grade 3/4 intermittent non weight bearing lameness
Palpation on right hind leg revealed medial buttressing on right stifle
Negative cranial drawer
Patella easily luxated to medial side of trochlear groove when leg is extended
When the leg is flexed, the patella returns to the trochlear groove
We included these facts because they give us a more specific idea of what is going on in the right hindlimb.  It narrows the lameness to the stifle region and the medial buttressing leads us to believe that it may be a problem with the cranial cruciate ligament.  The ability of the patella to be luxated and returned to the trochlear groove gives us an idea of the severity of the problem in the stifle joint.

No abnormalities in hip joint, long bones, muscles or other joints in the leg
Pain response on dorsal flexion of tail
No pain response with direct pressure to the spine and lumbosacral joint
This is important because it allows us to narrow the problem to the stifle joint.

Palpation of the left hind leg revealed only a pain response when cranial drawer was tested and patella luxation was tested.
We will need to address the issue of pain in the left stifle.  This problem could be either congenital or compensatory due to the pain in the right stifle joint.