Osteochondrosis-like lesion of the anconeal process in two horses.

The study involves discovery and treatment of an osteochondrosis-like lesion in the elbow joint of two horses, with one case identified during a routine lameness examination and another at necropsy. The first horse showed an improvement post intra-articular treatment with hyaluronic acid. Both horses had also been affected with osteochondrosis in other joints.

Lesion Discovery

• This study identified a type of lesion similar to osteochondrosis dissecans situated in the conjoined area of the humerus (the upper forelimb bone) and radius (one of the two-pronged forearm bones), collectively referred to as the elbow joint in two different horses.
• The lesion in the first horse was detected during a standard lameness evaluation. Lameness, in veterinary terms, refers to an inability to move comfortably due to a disorder in the locomotor system. The resolution of the lameness after anesthetizing the elbow joint indicated that the cause was directly associated with the joint.
• In contrast, the second horse had already passed away, and the lesion was identified during the post-mortem investigation, or necropsy.

Treatment and Response

• The first horse underwent treatment involving the injection of hyaluronic acid (a type of lubricant and shock absorber) directly into the affected elbow joint, a procedure known as intra-articular treatment.
• Following the treatment, an improvement was observed in the horse’s condition, suggesting that this form of therapy may be effective in managing such joint disorders in equines.

Associated Conditions

• Furthermore, both the horses were observed to have osteochondrosis dissecans affecting other joints as well.
• Osteochondrosis dissecans is a condition affecting horses where securing cartilage to subchondral bone is hindered, resulting in the flaking away of the joint cartilage (dissecans). This condition is painful and typically affects young horses.