CLINICAL
SIGNS
Diagnosing Developmental Orthopedic Disease
There are many general signs that horse caregivers can look for to identify a potential DOD case. These include lameness, stiffness, and inflammation. Other signs to watch for are difficulty moving, and limb abnormalities [3]. Identifying DOD earlier can improve the welfare of your horse through quicker treatment and not causing worsening pain, improve the likelihood of recovery, and save the horse owner money by avoiding severe outcomes requiring surgical intervention. Although using preventative practices may reduce the chances of worsening clinical signs, they do not serve as a proper treatment or cure. A concerned horse caregiver should seek professional medical assistance through a veterinarian.
Always consult with your veterinarian if you suspect your horse has orthopedic concerns so that the issue can be diagnosed and the horse can be treated accordingly. General diagnosis methods for DOD include nuclear imaging and blood tests [3]. However, there are various diagnostic methods available for the various forms of DOD. The optimal time for early detection of DOD is 6 months via x-rays [4].
Please see the different clinical signs and diagnostic tests for common forms of DOD below. It is important to note that this is not an exhaustive list, but it is a good starting point.
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Photo By: Vet Choice
Osteochondrosis
Clinical Signs:
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Up to 6 months old [10];
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Trouble keeping up with other animals
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Laying down more often
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Joint swelling
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Stiffness
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Age one year and up [10];
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Stiffness of joints
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Lameness
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Pain occurs when bending the joint
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Signs regardless of equids’ age:
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Please note that many foals may not show any signs [10]
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Non-painful joint swelling [10]
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Observation of lameness [13]
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Altered performance [10]
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Fragments of detached cartilage can result in osteochondritis dissecans and cause pain and lameness [11]
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Clinical signs for this can vary based on the activity level of the horse and degree of detachment [11]
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Diagnostics [3,10]:
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Physical examination by a veterinarian
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Imaging by a veterinarian (ie. ultrasound, x-rays, MRI, etc.)
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Arthroscopy while imaging
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Photo By: Cave Creek Equine
Cervical Vertebral Malformation/ Wobbler Syndrome
Clinical signs [3]:
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Ataxia or lack of coordination, likely in the hindquarters
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Weakness
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Weight loss
Diagnostics [3]:
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Neurological examination and diagnostic evaluation in combination
Subchondral Bone Cysts
Diagnostics:
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Requires radiographic imaging [12]
Physitis
Diagnostics [3]:
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Extraction of synovial fluid from the affected joint(s) and subsequent laboratory assessment
Limb Deformities
Clinical signs:
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Visible abnormalities of the limbs [14]
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Occurs immediately after birth and during growth [14]
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Weakness post exercise [14]
Diagnostics:
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Limb palpation [14]
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Analyzing the limb in sagittal plane [14]
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