Correction of angular limb deformity in a 4 month old German Shepherd

Abstract

This is the case report of a 4 month old female German Shepherd that was diagnosed with an angular limb deformity. General physical examination was unremarkable on presentation, while orthopedic examination of the right forelimb revealed radius curvus, carpal valgus, and decreased elbow flexion with pain. A presumptive diagnosis of premature closure of the distal ulnar physis was made. CT examination was performed in preparation of surgical correction revealing subluxation of the radial head, incongruity of the radial head and ulna at the elbow joint, and abnormal distal radial and ulnar physes. Distal ulnar ostectomy was performed with the distal ulnar physis submitted for histopathology, confirming premature closure of the physis. Subsequent recheck examinations revealed inadequate radial lengthening and correction of the deformity leading to a second surgery. Radial osteotomy was performed and a circular external skeletal fixator was placed on the limb to allow both correction of the angular limb deformity and distraction osteogenesis of the radius. Follow-up examinations monitored progression of limb lengthening and deformity correction until surrounding soft tissue structures would no longer allow further distraction.