Presentation
Presents with varus deformity of the forelimb that has been present since purchased from breeder at 2 months of age.
Patient Data
Right thoracic limb: There is a gap present between the distal radius and ulna. The ulna is mildly thickened, particularly distally. A single digit is associated with the radius and 3 digits are associated with the ulna. Multiple smooth round osseous bodies are present associated with the carpal bone believed to be the radial carpal bone and the second carpal bone. The accessory carpal bone and ulnar carpal bones are present laterally and the distal row of carpal bones are indistinct. The third most axial digit believed to be digit 3 has thinner, smaller bones and there is a mal-alignment between the proximal phalanx and the middle phalanx. The metacarpal associated with this phalanx is also small. The metacarpal bone associated with what is believed to be the second digit is short and relatively thick. There is malarticulation between this metacarpal bone and the proximal phalanx. The bones of what is believed to be the second phalanx are also short. There is increased tissue or soft tissue swelling associated with the carpus and phalanges of the right thoracic limb.
Left thoracic limb: No abnormalities are present.
Impression:
Ectrodactyly of the right thoracic limb.
Case Discussion
Ectrodactyly is evident from the division of the radius and ulna on the right thoracic limb. In this case it is unilateral. This developmental disorder is results in a "split foot" where digits may be absent.
This dog was able to use the limb and had no lameness. No treatment was pursued at this time.
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