A 10-year-old 24.6-kg (54.1-lb) spayed female German Shepherd Dog mix was evaluated because of signs of cervical pain of 1 month's duration and acute left pelvic limb lameness of 5 days’ duration.
Physical examination revealed signs of pain during left tarsal joint manipulation and an enlarged left popliteal lymph node. Mild to moderate effusion was evident in the left tarsal region (