Azzore Veterinary Specialists
www.azzore.com
Ununited Anconeal Process (UAP)
a condition of the elbow that is typically seen in dogs from 6 to 12 months of age and usually affects dogs
of large to giant breeds.
There are three bones that make up the elbow in canines: the humerus is the bone above the elbow and
the radius and ulna are the bones below the elbow. UAP occurs when one of the bones in the elbow does
not fuse properly.
The anconeal process is a bony protrusion in the elbow joint that should fuse to the end of the ulna by the
time a dog is 5 months old. If the fusion does not occur, it is known as UAP. The anconeal process
becomes a loose, bony fragment that ultimately causes damage to the joint and speeds the progression
of degenerative joint disease in the affected elbow. The condition is likely caused by the uneven growth of
the two lower leg bones, but can also be attributed to Osteochondrosis lesions in the joint (for more
information, see Osteochondrosis Dissecans under veterinary orthopedic procedures). Surgical correction
is the only method for repairing the joint and slowing or halting the progression of elbow dysplasia.
Symptoms:
Most often occurring in young German Shepherds, Basset Hounds and Saint Bernards.
Symptoms include:
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Lameness in involved limb
Possible swelling and tenderness around the elbow joint
Procedure:
Surgical options for correcting UAP include the use of screws to permanently attach the anconeal process
to the ulna, the removal of the anconeal process, and ulnar osteotomy, which relieves pressure on the
UAP. Depending on the age and size of the dog, as well as the type of procedure that would provide the
best prognosis for full recovery and prevent further development of degenerative joint disease, the
surgical procedure will be chosen by the board certified veterinary surgeon and pet owner to provide the
best possible results.
866-838-4282