Rheumatoid Arthritis

Rheumatoid Arthritis: a chronic inflammatory joint and tissue condition

Rheumatoid arthritis is an autoimmune disorder, classified as a chronic inflammatory disease affecting the joints (bones and cartilage) but also soft tissues (tendons, ligaments, skin). At the Foot and Ankle Clinic, we manage ankle and foot pathologies in the context of rheumatoid arthritis.

Understanding Rheumatoid Arthritis

Rheumatoid arthritis is characterized by an autoimmune reaction leading to chronic inflammation of the joints. Affecting around 0.5 to 1% of the adult population, it most often occurs in middle-aged individuals, with a predominance in women. Several factors, including a genetic predisposition and environmental influences such as smoking, contribute to its onset. The disease is distinguished by persistent symptoms and a variable progression from one patient to another.

Pathophysiology and Inflammatory Mechanisms

Rheumatoid arthritis begins with a synovitis characterized by aggressive hyperplasia of the synovial membrane and a massive infiltration of immune cells (macrophages, CD4+ T and B lymphocytes) that recognize antigens presented via the HLA‑DR complex (shared epitope) and initiate the inflammatory response. This immune activation results in the excessive production of pro-inflammatory cytokines (mainly TNF‑α, IL‑1, and IL‑6) by synoviocytes and macrophages, stimulating the proliferation of the synovial pannus and the secretion of metalloproteinases (MMPs) responsible for the degradation of cartilage (type II collagen) and the extracellular matrix. Simultaneously, these same cytokines promote the expression of the RANKL ligand on T lymphocytes and synovial fibroblasts, inducing the differentiation of pre-osteoclasts into active osteoclasts that erode the subchondral bone and create the characteristic geodes of the disease.

The pannus progressively invades the joint space, weakening tendons and ligaments, which leads to instability, deformities, and the tendon ruptures frequently observed in the foot and ankle. Finally, a chronic imbalance between pro-inflammatory cytokines and anti-inflammatory mediators (IL‑4, IL‑10, soluble receptors of TNF‑α) prevents the resolution of inflammation, perpetuating the joint destruction characteristic of rheumatoid arthritis.

Symptoms and Diagnosis

Patients with rheumatoid arthritis may experience intense joint pain, deep and persistent, resulting from inflammation of the synovial membrane lining the joint (synovitis). This inflammation generates characteristic morning stiffness, lasting at least 30–60 minutes after waking, a key sign distinguishing rheumatoid arthritis from other non-inflammatory joint pain. The affected joints (hands, wrists, feet, ankles, knees) appear swollen, warm, and tender to the touch due to accumulation of synovial fluid and proliferation of inflammatory tissue. At the same time, the excessive production of cytokines (notably IL‑6) causes deep fatigue and a general feeling of malaise, reflecting systemic inflammation.

Some joint damage, however, is asymptomatic, as seen in the case of the characteristic fusing tarsitis of rheumatoid arthritis.

The diagnosis is initially based on a detailed clinical examination — assessment of the number of painful and swollen joints, compression test ("squeeze test"), and duration of morning stiffness — complemented by blood tests and imaging. Blood tests look for two specific autoantibodies: rheumatoid factor (positive in 50–60% of early cases) and anti‑CCP antibodies (specificity ≥ 95% for the disease). Imaging examinations are essential: standard X-rays help detect joint space narrowing and bone erosions once present, while ultrasound and MRI can identify synovitis, erosions, and bone edema at an early stage.

Early diagnosis is important to initiate long-term treatment in the most aggressive forms, slow the progression of lesions, prevent deformities, and optimize long-term quality of life.

Impact on the Musculoskeletal System and Joint Structures

Chronic inflammation causes a progressive destruction of joint tissues, known as inflammatory arthritis, resulting in bone erosions and demineralization that lead to irreversible deformities. At the same time, the cartilage, which normally absorbs shocks and allows painless joint movement, gradually wears down, reducing the range and painlessness of movements. The tendons and ligaments, constantly exposed to an inflammatory environment, lose their strength and become prone to rupture or to experiencing repeated micro-injuries. Together, these complex structural changes explain the loss of function and restriction of joint mobility observed in patients with rheumatoid arthritis.

Medicinal and Therapeutic Treatments

To slow the progression of rheumatoid arthritis and quickly reduce joint inflammation, non-steroidal anti-inflammatory drugs (NSAIDs) and corticosteroids are prescribed as first-line treatment during acute flare-ups. Corticosteroids (prednisone or intra-articular injections) provide rapid relief from pain, heat, and joint swelling, but prolonged use exposes patients to numerous adverse effects (osteopenia, osteoporosis, hypertension, diabetes), which limits their use to the most severe symptomatic phases.

To address the underlying autoimmune mechanism and prevent irreversible joint damage, several treatments may be proposed by a rheumatologist. Methotrexate is a disease-modifying treatment that can slow long-term disease progression. Other agents (sulfasalazine, leflunomide, or hydroxychloroquine) may be used in monotherapy or in combination, depending on clinical response and tolerance.

In cases of high inflammatory activity, targeted therapies represent the second line of treatment. TNF-alpha inhibitors (adalimumab, infliximab, etanercept) specifically block this key cytokine in inflammation, while IL-6 antagonists (tocilizumab, sarilumab) prevent the pro-inflammatory effects of interleukin-6. These biotherapies have greatly reduced joint deformities, especially in the hands and feet.

Finally, regular clinical and biological monitoring by a rheumatologist, assessing pain, the number of swollen joints, erythrocyte sedimentation rate (ESR), and C-reactive protein (CRP), as well as imaging, is essential to adjust doses, change to a different therapeutic class in case of failure, and prevent complications, for a personalized management of the disease.

Rheumatoid arthritis at the Foot and Ankle Clinic?

At the Foot and Ankle Clinic, we treat patients with rheumatoid arthritis.

The surgical procedures frequently performed for rheumatoid conditions affecting the ankle and foot are:

The management of rheumatoid arthritis is both medical and surgical. Regular follow-up with a rheumatologist is essential for adjusting the treatment to the progression of the disease. In cases of painful and resistant joint deformities or damage despite medical treatment, specialized surgical management may be offered.

FAQ – Answers to Your Questions

The first symptoms include persistent joint pain (often in the wrists, hands, and feet), morning stiffness, and bilateral joint swelling. These signs lasting more than six weeks warrant a consultation with a rheumatologist for early diagnosis and prompt care.

The progression varies from person to person. Regular follow-up, combined with appropriate treatment, helps limit structural damage and maintain good joint function.

Disease-modifying treatments can lead to immunosuppression (risk of infection) and may affect the liver, kidneys, and heart. Neurological disorders, severe allergic reactions (anaphylactic shock), and anti-drug antibodies can also develop.

Genetic predisposition increases the risk (2–5× if a parent is affected), but heredity alone does not explain the disease (10–15% concordance in identical twins). Environmental factors (smoking, microbiota) are thought to play a major role.

Rheumatoid arthritis does not prevent having a child. Several treatments (methotrexate, anti-JAK) are contraindicated during pregnancy, while anti-TNF and some anti-IL-6 can be continued under supervision. A personalized plan established by a rheumatologist is essential.

Rheumatoid arthritis at a glance

Rheumatoid arthritis is an autoimmune disease with wide-ranging impacts on joint structures. Early diagnosis and personalized treatment are essential to limit the risk of joint deformities and joint damage in the short, medium, and long term.

Biotherapies have significantly improved the quality of life for patients with rheumatoid arthritis.

In cases of painful destructive arthritis or joint deformities of the ankle and foot, surgical management may be considered.