Ultrasonographic examination of the dorsal aspect of the distal interphalangeal joint of the horse
Authors: Dupays A.‐G., Coudry V., Denoix J.‐M.
Journal: Equine Veterinary Education
Summary
# Ultrasonographic Examination of the Dorsal Distal Interphalangeal Joint Soft tissue pathology at the distal interphalangeal joint frequently goes undetected on radiographs alone, yet represents a significant source of lameness and performance limitation in horses. Dupays and colleagues established a detailed ultrasonographic protocol for the dorsal aspect of this joint, documenting normal transverse and longitudinal anatomical images to serve as a diagnostic reference standard. Beyond conventional radiography, ultrasound reliably identified joint capsule distension, synovitis, articular cartilage defects, periarticular bone proliferation, and intra-articular bone fragments across multiple clinical cases presented in the paper. For practitioners managing foot lameness, this imaging approach provides crucial complementary information for diagnosis and monitoring of degenerative and traumatic joint lesions that would otherwise remain invisible on radiographic examination. Incorporating dorsal DIP joint ultrasonography into routine foot assessments enables earlier detection of pathology and more informed treatment planning, particularly relevant given the high-motion demands placed on this articulation during ridden work.
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Practical Takeaways
- •Ultrasound should be used alongside radiography when examining distal interphalangeal joint problems, as it reveals soft tissue changes that X-rays miss
- •Familiarity with normal ultrasonographic anatomy in both transverse and longitudinal views is essential for accurate identification of pathology
- •This imaging modality is particularly useful for detecting early synovitis and cartilage changes before they become radiographically apparent
Key Findings
- •Ultrasonographic examination of the dorsal distal interphalangeal joint is an essential component of routine foot structure evaluation
- •Ultrasonography can identify soft tissue and joint abnormalities including synovitis, fluid distension, and cartilaginous defects that may not be visible on radiographs
- •Both transverse and longitudinal ultrasonographic planes are necessary for comprehensive assessment of dorsal DIP joint anatomy and pathology