- Cause : chronic inflammation of the sesamoid bones.
- Cause of lameness and incidental finding in the racing greyhound.
- Lameness in large pet breeds, eg Rottweiler.
- Signs : often an insidious onset, progressive forelimb lameness in young dogs, or can also be acute onset lameness in adults.
- Diagnosis : clinical signs and radiography.
- Treatment : conservative, or surgical removal of sesamoids.
- Prognosis : guarded for resolution.
- Localized soft tissue swelling around affected palmar aspect of the metacarpo-phalangeal joint.
- Pain on metacarpophalangeal joint flexion.
- Reduced range of flexion.
- Sesamoid fractures .
- Bipartite or multipartite sesamoid bones ( developmental malformation) .
- Metacarpo-phalangeal joint dislocation/ligament damage [Greyhound: digit injuries].
- Septic arthritis or cellulitis .
- Neoplasia of bone or soft tissue .
- Hypertrophic osteodystrophy .
- LAMENESS ELSEWHERE! Rottweilers are prone to elbow and shoulder lameness.
- Conservative treatment usually adequate for pet dog.
- If significant degenerative joint disease, may need long-term non-steroidal anti-inflammatory treatment or digit amputation for sporting dogs [Greyhound: digit injuries].
Check for lameness elsewhere.
Expected response to treatment
- Lameness should improve over 4-6 weeks in conservatively managed cases.
- If lameness persists after surgery, this may be due to degenerative changes at the MCP joint.