4 year old Yorkshire Terrier

Findings

On radiographs of the left pelvic limb, there is lysis of the second metatarsal bone with only a proximal remnant. The third digit, including P1-2 and the distal metatarsal bone, are also lytic. The regions surrounding the distal interphalangeal joint of P5 are also lytic. P4 appears intact. There are small fragments of soft tissue in the region of the lytic metatarsal bones. The soft tissues surrounding this region are thickened, and there is smooth periosteal reaction and sclerosis of the third and fourth metatarsal bones.