Canine Ununited Anconeal Process (UAP)

Ununited anconeal process (UAP) is an elbow disorder most often affecting young German Shepherds, although it can be seen in almost any breed. The underlying problem is not clearly understood. UAP may be associated with mal-alignment of the elbow joint or a genetic juvenile bone disorder called osteochondrosis.

The most common clinical signs are limping and swelling of the elbow joint. Clinical signs usually appear at about 6-8 months of age. Radiography (X-ray) is used to make the diagnosis.

Treatment options include arthroscopy to rule out concurrent diseases such as fragmented medial coronoid process, ulnar osteotomy, fragment removal or fragment re-attachment. Treatment should be initiated as soon as the diagnosis is made. The prognosis is fair to good.