Arthritis

What is arthritis?

Arthritis refers to any condition that causes inflammation and damage to one or more joints. The joint, where two bones meet, is normally cushioned by cartilage and lubricated by synovial fluid, allowing smooth, pain-free movement. In arthritis, this system breaks down through different mechanisms depending on the type.

The most clinically significant subtypes include:

• Osteoarthritis: The most common type, caused by the gradual breakdown of protective cartilage. It leads to pain and stiffness in weight-bearing joints like the hips, knees, and spine.

• Rheumatoid arthritis (RA): An autoimmune disease where the immune system attacks joint linings. It typically affects joints symmetrically (e.g., both wrists) and can impact organs like the heart and lungs.

• Psoriatic arthritis: Linked to the skin condition psoriasis, this inflammatory type affects both skin and joints, often causing swelling in tendons and the spine.

• Gout: A metabolic condition caused by uric acid crystals depositing in the joints, leading to sudden, acute inflammatory attacks.

• Ankylosing spondylitis: A chronic inflammation primarily targeting the spine and sacroiliac joints, which can lead to progressive stiffness or spinal fusion.

• Reactive arthritis: Joint inflammation triggered by a previous infection elsewhere in the body, such as the digestive or urinary tract.

Symptoms of arthritis

Symptoms vary by subtype but commonly include:

• Pain and aching: Tenderness or pain during movement or while at rest.

• Morning stiffness: Lasting over 30 minutes often indicates inflammatory types (RA, Psoriatic) rather than degenerative joint disease.

• Inflammation: Visible swelling, warmth, or redness around affected joints.

• Functional loss: Reduced range of motion or a grinding sensation during movement.

• Fatigue: Persistent exhaustion, particularly common in autoimmune and inflammatory forms.

• Symmetry: Pain affecting the same joints on both sides of the body (characteristic of RA).

• Acute attacks: Sudden, intense pain in a single joint, frequently the big toe (characteristic of Gout).

The specific pattern and distribution of these symptoms are vital clues for diagnosis, which is why clinical assessment alongside testing matters.

What causes arthritis?

Causes differ significantly by subtype:

• Osteoarthritis: Driven by aging, joint injury, obesity, and mechanical wear.

• Rheumatoid arthritis: An autoimmune dysfunction triggered by genetics (HLA-DR4) and environment (smoking).

• Psoriatic arthritis: An autoimmune response closely linked to psoriasis and genetic factors.

• Gout: Caused by high uric acid due to diet, kidney function, or metabolic syndrome.

• Ankylosing spondylitis: Strongly linked to the HLA-B27 gene and typically begins in early adulthood.

• Reactive arthritis: Triggered by bacterial infections, often gastrointestinal or urogenital.

In all inflammatory types, chronic systemic inflammation is the primary driver of joint damage, making early intervention vital to prevent irreversible destruction.

How is arthritis detected?

Arthritis is detected by combining imaging to visualize joint structures with blood tests to identify inflammation and autoimmune markers.

MRI is superior to X-ray for identifying early signs of inflammatory arthritis, such as synovial inflammation and bone marrow swelling, long before structural damage is visible, making it particularly valuable for conditions like ankylosing spondylitis. For osteoarthritis, diagnosis is usually clinical, based on symptoms and a physical exam, with X-ray as the standard imaging tool when needed. Elfcare's full body MRI scans the spine and pelvis as standard, useful for detecting inflammatory spinal disease and picking up hip joint changes incidentally.

Blood tests are vital for distinguishing between autoimmune, inflammatory, and metabolic forms of arthritis. Relevant markers in Elfcare's panel include:

• Rheumatoid factor (RF): A primary autoimmune marker for RA.

• CRP: Measures active inflammation and tracks disease progression.

• Uric acid: The primary indicator of gout risk and crystal deposition.

• Metabolic markers (HbA1c/glucose): Screen for diabetes and obesity, which exacerbate osteoarthritis and gout.

• Bone and health markers (vitamin D/calcium/ALP): Assess bone metabolism and structural health across all subtypes.

• Ferritin and hemoglobin: Monitor for anemia, which is common in chronic inflammatory conditions.

Important: A negative RF does not exclude rheumatoid arthritis (seronegative RA). Anti-CCP antibodies (not currently in Elfcare's panel) are more specific for RA and may be arranged as part of follow-up diagnostics if clinical suspicion is high.

Why early detection matters

In inflammatory arthritis, particularly rheumatoid arthritis, joint destruction begins early, often within the first two years of disease onset. Early treatment with disease-modifying antirheumatic drugs (DMARDs) can halt this destruction and preserve joint function.

In osteoarthritis, identifying risk factors early, such as excess weight, vitamin D deficiency, joint malalignment, allows for interventions that slow progression before significant cartilage loss occurs.

In gout, normalising uric acid prevents recurrent attacks and long-term joint and kidney damage.

Across all subtypes, the earlier arthritis is identified and the underlying cause addressed, the better the long-term outcome for joint function and quality of life.

How Elfcare can help

Elfcare’s full body MRI scans the spine and pelvis, critical sites for hip osteoarthritis and inflammatory spinal disease. This imaging detects early soft-tissue inflammation and bone erosions long before they appear on standard X-rays. For focused evaluation of the knees, hands, or sacroiliac joints, targeted regional MRI is also available.

Our 80+ biomarker test targets the primary indicators of joint disease, including Rheumatoid Factor (RF), CRP, and uric acid. By measuring these alongside Vitamin D and metabolic markers, we can distinguish between autoimmune conditions, metabolic gout, and mechanical wear.

If our screenings identify suspicious findings, Elfcare manages the next steps, coordinating further diagnostics or referring you directly to the appropriate specialist for treatment.