Chondromalacia of the Patella

Chondromalacia of the Patella (also known as CMP) is inflammation of the underside of the Patella and softening of the cartilage. Chondromalacia patellae is a term sometimes treated synonymously with patellofemoral pain syndrome.

Chondromalacia is not common in horses, and is most common in foals as a larger part of developmental orthopedic disease. Frequently, there are no localizing signs, although mild effusion of the medial femorotibial and/or femoropatellar joints may be evident.

Typically there are no radiologic or ultrasonographic signs evident. Arthroscopic examination of the femorotibial joints reveals abnormally soft, irregular, cracked, pitted, and poorly attached articular cartilage over all or part of the femoral condyles.

Generally, the prognosis for sustained return to athletic soundness is guarded.