Hypertrophic osteodystrophy of the proximal humerus in two dogs.

Two dogs, 3 and 6 months of age, were presented with painful, swollen shoulder and carpal joints; reluctance to stand; and pyrexia. Radiographs in both cases revealed an irregular lucent zone in the metaphysis of the proximal humerus, parallel and adjacent to the physis. The same lucent zone was also evident in the physes of the distal radial and ulnar metaphyses. Clinical signs and radiographs were consistent with hypertrophic osteodystrophy. Clinical signs resolved in both dogs with administration of carprofen, tramadol, and intravenous fluids. No signs of recurrence were reported at 3-month follow-ups.