A 10-year-old female donkey was evaluated because of a large soft tissue mass over the right tarsus. The patient had no history of trauma and began to develop the mass 12 months prior to evaluation. On palpation, the mass was compressible and movable. Subcutaneous fluid was detected, and there were no signs of pain on palpation of the lesion. The donkey was sound during serial lameness examinations, and results of hematologic and serum biochemical analyses were unremarkable. Radiographs of the right tarsus were obtained (Figure 1).
Lateral (A) and dorsoplantar (B) radiographic images of the
Dr. Amory's present address is Section of Radiology, Department of Clinical Studies-Philadelphia, School of Veterinary Medicine, University of Pennsylvania, Philadelphia, PA 19014.
Dr. Page's present address is Antech Imaging Services, 17672-B Cowan Ave, Irvine, CA 92614.
Dr. Bidwell's present address is Department of Large Animal Clinical Sciences, College of Veterinary Medicine, Michigan State University, East Lansing, MI 48824.