Comparison of the diagnostic value of ultrasonography and standing radiography for pelvic-femoral disorders in horses.
Authors: Geburek Florian, Rötting Anna K, Stadler Peter M
Journal: Veterinary surgery : VS
Summary
# Editorial Summary: Ultrasonography versus Radiography for Equine Pelvic-Femoral Disorders Pelvic and hip joint injuries in horses present a diagnostic challenge, particularly because standing radiography has inherent limitations in imaging the cranial and lateral aspects of the pelvis. Geburek and colleagues retrospectively compared ultrasonographic findings (both transcutaneous and transrectal approaches) against standing radiography in 25 equids with suspected pelvic or coxofemoral pathology, documenting concordance and areas of diagnostic superiority for each modality. Overall agreement between the two techniques was modest at 73%, with a notable complementary relationship: ultrasonography identified all four ilial wing fractures whilst radiography failed to detect any of these, whereas radiography proved superior for acetabular fractures (identifying 8 of 9 compared to ultrasonography's 6). Both modalities performed equally well for fractures of the tuber coxa, ilial shaft, ischium, and femoral neck, as well as coxofemoral osteoarthritis. For practitioners managing horses presenting with severe hindlimb lameness and suspected pelvic trauma, this work supports ultrasonography as the preferred initial imaging approach—it is non-invasive, requires no sedation, can be performed rapidly in the field or clinic, and demonstrates high diagnostic yield, particularly for ilial wing fractures which are notoriously difficult to visualise radiographically. However, clinicians should recognise that neither technique is wholly sufficient alone; acetabular involvement warrants radiographic confirmation, and the occurrence of occult fractures missed by both modalities highlights the value of integrating imaging findings with clinical examination and diagnostic analgesia.
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Practical Takeaways
- •Use ultrasonography as your first imaging choice for severe hindlimb lameness suspected to involve the pelvis—it's fast, safe, and catches ilial wing fractures that radiographs miss
- •If ultrasonography is inconclusive for acetabular involvement, follow up with standing radiography since acetabular fractures show better on radiographs
- •Recognize that ultrasonography has high diagnostic yield for pelvic disorders and can be performed on-farm without sedation, making it practical for field work
Key Findings
- •Ultrasonography and radiography showed 73% agreement (24/33 findings) for pelvic-femoral disorders in 25 equids
- •Ultrasonography detected all 4 ilial wing fractures while standing radiography missed them entirely
- •Radiography identified 3 of 9 acetabular fractures that ultrasonography missed
- •Both modalities identified equal numbers of tuber coxa (4), ilial shaft (2), ischium (3), femoral neck (2) fractures and coxofemoral OA/OS (6)