Osseous abnormalities associated with collateral desmopathy of the distal interphalangeal joint: part 1.

This study aims to establish the frequency and characteristics of bone abnormalities connected to collateral ligament (CL) injury in horse’s feet, and also whether osseous abnormalities are related to increased radiopharmaceutical uptake (IRU) and the duration of lameness. The study reveals that around 45.7% of examined horse feet showed osseous abnormalities, more frequently found at the ligament insertion point than the origin. There was also a notable connection between the appearance of IRU and bone injury.

Objective

• The research aims to detail the frequency and nature of bone abnormalities linked to CL injury around the distal interphalangeal (DIP) joint in horses. The study also investigates any connection between these osseous abnormalities, increased radiopharmaceutical uptake, and the duration of any lameness caused by such a CL injury.

Methodology

• The researchers analyzed magnetic resonance images of 313 feet from 289 horses, all of whom had been diagnosed with collateral desmopathy of the DIP joint. They looked for the presence and type of osseous abnormalities in the middle and distal phalanges of each foot.
• Scintigraphic images were also examined to identify any instances of increased radiopharmaceutical uptake in the middle or distal phalanges.

Results

• The research discovered osseous abnormalities in 143 of the 313 feet studied, which is about 45.7% of the total. Of these, 27 featured CL and bone injury only, whereas the rest also had multiple injuries inside the hoof capsule.
• The most common types of osseous abnormalities were enthesous new bone and endosteal irregularity in the middle and distal phalanges.
• Osseous abnormalities were more frequently present at the point of ligament insertion than at its origin. Additionally, more abnormalities were found on the medial side of the foot compared to the lateral side.
• The study found a noteworthy relationship between the incidence of increased radiopharmaceutical uptake and the presence of bone injury.

Conclusions

• Osseous abnormalities of varying severity appear to be associated with CL injury.
• The results revealed that normal radiopharmaceutical uptake does not necessarily rule out significant bone pathology connected to CL injury.
• Further studies are needed to determine if these bone abnormalities linked to CL injury have an impact on the prognosis for a horse’s return to athletic performance.