Summary
A diagnosis of congenital bilateral patellar aplasia was made in two male littermate
Siamese cats that presented for abnormal conformation and hind limb gait. Both cats
had abnormalities of the femora, tibiae, fibulae, and tali. The owners reported that
the cats were able to ambulate adequately in the house and jump onto low-lying objects.
Other than signs related to this developmental anomaly, significant abnormal clinical
signs were not noted in either cat. According to the owner, none of the other littermates
were affected, but the seven year old sire displayed identical clinical signs. Unfortunately,
the sire and littermates were not available for examination. Treatment was not pursued
for either cat.
Keywords
Aplasia - cats - patella
