FIG 4.

Further radiographic examples of synovial osteochondromas in cats with osteoarthritis. (a) Lesions in a geriatric cat with DJD of both shoulders. Courtesy of Randolph Baral and Melissa Catt. (b) Lesions in a cat with DJD of both elbows. Courtesy of Richard Gowan. (c) Multiple synovial osteochondromas adjacent to the elbow joint of an aged cat with severe elbow osteoarthritis. (d) Stifle of a cat with DJD secondary to mucopolysaccharidosis type VI, a lysosomal storage disease caused by a deficiency of N-acetylgalactosamine-4-sulfatase ¹³