Evaluation of cartilage lesions on the medial femoral condyle as a cause of lameness in horses: 11 cases (1988-1994).

The research article investigates the impact of cartilage lesions on the medial femoral condyle in causing lameness in horses and the corresponding treatment responses. The assessment was done on 11 horses through diagnostic arthroscopy, with the results indicating that lesions can lead to lameness and that debridement treatment showed successful recovery in horses with focal cartilage lesions.

Research Methods and Subjects

• The researchers adopted a retrospective case series approach to evaluate the medical records of 11 horses detected to have cartilage lesions on the medial femoral condyle through arthroscopic examination of the stifle.
• Information on the signalment, history, lameness examination, response to intra-articular anesthesia, radiographs of the stifle, observations during diagnostic arthroscopy, treatment and follow-up examinations was scanned from the medical records of these horses. These constituted essential parameters to understand the severity of the lesions, treatment response and recovery rates.

Results and Observations

• Notwithstanding the cause of the lameness, all horses experienced an improvement in their gait following an intra-articular injection of anesthetic. This implies external factors or pain could have amplified the lameness and anesthesia could temporarily relieve these influences.
• Further, no abnormalities were found through radiography of the stifle. Thus, it is possible that the lesions might not provide visible signs through radiography and necessitate alternatives like arthroscopic examination for detection.
• The arthroscopy conducted on 12 affected joints in the 11 horses revealed dimpled, wrinkled and infolded cartilage, and a blunt arthroscopic probe could penetrate into the subchondral bone. These conditions are indicative of cartilage damage.
• In addition to focal lesions, generalized damage to the cartilage on the medial femoral condyle was found in 4 horses. Among these, debridement was not done on two horses because of extensive damage to the cartilage.

Treatment and Recovery

• In the remaining cases, focal cartilage lesions on the femoral condyle were debrided. The process involves the removal of loose fragments of cartilage or subchondral bone from the joints.
• Of the 7 horses where debridement was performed, 6 were found to have fully recovered and resumed their previous activities. This indicates that debridement could be a potential treatment method for lameness caused due to focal cartilage lesions.

Conclusions

• The research concludes that cartilage lesions on the medial femoral condyle can be a leading cause of lameness in performance horses. The study emphasizes the need for diagnostic arthroscopy in detecting such conditions accurately.
• Further, debridement of focal cartilage lesions showed positive results in providing relief and resuming performance activities in some horses, making it a promising treatment option.