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Mid-foot disassociation in rheumatoid arthritis
Journal of the Canadian Association of Radiologists
|September 1, 1981
Summary
Rheumatoid arthritis commonly affects the mid-foot, causing joint damage and potential dislocation. Long-term disease can lead to a flattened arch, impacting foot structure and function.
Area of Science:
- Orthopedics
- Rheumatology
- Radiology
Background:
- Rheumatoid arthritis (RA) is a chronic autoimmune disease.
- RA frequently impacts the joints of the foot and ankle.
- Mid-foot involvement in RA can lead to significant structural changes.
Purpose of the Study:
- To describe the common radiographic findings of rheumatoid arthritis in the mid-foot.
- To detail the patterns of joint involvement and potential deformities in the mid-foot due to RA.
Main Methods:
- Review of radiographic findings in patients with rheumatoid arthritis.
- Analysis of joint changes including sclerosis, erosions, and subluxation in the mid-foot.
- Assessment of hindfoot and forefoot alignment in relation to mid-foot pathology.
Main Results:
- Subchondral sclerosis and erosions at the talonavicular joint are common in RA.
- Mid-foot dissociation with hindfoot subluxation is frequently observed.
- Forefoot subluxation can occur concurrently with mid-foot dissociation.
- Long-standing RA can result in loss of the normal plantar arch.
Conclusions:
- Rheumatoid arthritis significantly affects the mid-foot, leading to characteristic radiographic changes.
- Mid-foot involvement in RA can cause complex deformities involving dissociation and subluxation.
- Progressive loss of the plantar arch is a feature of long-standing rheumatoid arthritis in the foot.