Summary
A severe angular limb deformity secondary to premature closure of the distal ulnar
growth plate was diagnosed in a two year old Shetland sheep dog. Radiographic and
computerized analysis demonstrated elongation of the ipsi-lateral humerus. The elongation
was interpreted as a form of compensatory bone overgrowth similar to that described
in the tibia in response to premature closure of femoral growth plates. The regulators
of bone growth and possible mechanisms of compensatory overgrowth are reviewed.
Compensatory humeral overgrowth secondary to severe antebrachial angular limb deformity
was diagnosed in a young Shetland sheep dog. Humeral overgrowth was documented by
computerized analysis of digitized humeral radiographs. Potential mechanisms of compensatory
overgrowth are reviewed.
Keywords
Compensatory overgrowth - angular limb deformity