Hemochromatosis (Arthropathy)

Overview

Hereditary hemochromatosis (HH) is a genetic disorder that causes the body to absorb and store excess iron, primarily in the liver, pancreas, heart, skin, and joints. When iron accumulates in the joints, it can lead to a specific type of joint disease known as hemochromatosis‑related arthropathy. This arthropathy often mimics osteoarthritis but tends to affect particular joints (e.g., the second and third metacarpophalangeal joints) and may appear earlier than typical degenerative joint disease.

Most cases are caused by mutations in the HFE gene, especially the C282Y variant. The condition is more common in people of Northern European descent and typically manifests in adulthood, although iron overload can begin in childhood.

Symptoms Checklist

• Joint pain and stiffness, especially in the hands (2nd & 3rd MCP joints), knees, hips, and shoulders
• Swelling or warmth around affected joints
• Reduced range of motion
• Morning stiffness lasting < 30 minutes (often less severe than rheumatoid arthritis)
• Skin hyperpigmentation (“bronze” skin) – may coexist with joint symptoms
• Fatigue, weakness, or generalized malaise
• Abdominal pain or hepatomegaly (enlarged liver) – indicates systemic iron overload
• Diabetes mellitus (“bronze diabetes”) – can accompany arthropathy
• Heart rhythm abnormalities (arrhythmias) or cardiomyopathy in advanced disease

Risk Factors

• Genetic predisposition: Inherited mutations in the HFE gene (C282Y, H63D). Homozygosity for C282Y carries the highest risk.
• Family history of hemochromatosis or related complications.
• Age: Symptoms usually appear after age 30 in men and after menopause in women.
• Sex: Men are 2–3 times more likely to develop clinically significant iron overload because women lose iron through menstruation and pregnancy.
• Ethnicity: Highest prevalence in people of Northern European ancestry (≈1 in 200–300 carriers).
• Excess dietary iron or vitamin C supplementation (which enhances iron absorption).
• Chronic liver disease (e.g., hepatitis C) can exacerbate iron accumulation.

Diagnosis

Diagnosing hemochromatosis‑related arthropathy involves confirming systemic iron overload and then correlating joint findings.

1. Laboratory tests
   • Serum ferritin (elevated in >300 ng/mL for men, >200 ng/mL for women).
   • Transferrin saturation (TS) >45 % is highly suggestive.
   • Complete blood count and liver function tests to assess organ involvement.
2. Genetic testing for HFE mutations (C282Y, H63D). Positive homozygous C282Y confirms hereditary hemochromatosis in most cases.
3. Imaging
   • Plain radiographs of the hands often show symmetric joint space narrowing and osteophytes at the 2nd/3rd MCP joints.
   • MRI or ultrasound can detect early cartilage loss and synovial inflammation.
4. Liver biopsy (rare) – historically the gold standard for quantifying iron stores, now reserved for ambiguous cases.
5. Joint aspiration – performed only if infection or crystal arthropathy (e.g., gout) is suspected.

Reference guidelines from the American Association for the Study of Liver Diseases (AASLD) and the National Institutes of Health (NIH) are commonly used for diagnostic thresholds.[1][2]

Treatment Options

Therapeutic goals are to reduce total body iron, prevent organ damage, and manage joint symptoms.

Medical Treatments

• Therapeutic phlebotomy – the cornerstone of treatment. Typical schedule: 500 mL weekly until ferritin < 50 ng/mL, then maintenance phlebotomy every 2–4 months.[3]
• Iron chelation therapy (e.g., deferasirox, deferoxamine) – reserved for patients who cannot tolerate phlebotomy (e.g., anemia, severe cardiovascular disease).
• Analgesics & anti‑inflammatories
  • Acetaminophen or NSAIDs for pain control.
  • Low‑dose colchicine may reduce joint inflammation in some patients.
• Disease‑modifying agents – No specific DMARDs are approved for hemochromatosis arthropathy, but rheumatologists may use intra‑articular steroids for severe flares.
• Management of comorbidities
  • Diabetes: lifestyle modification, oral hypoglycemics or insulin as needed.
  • Cardiac monitoring and treatment of arrhythmias or cardiomyopathy.

Home & Lifestyle Treatments

• Limit dietary iron – avoid raw shellfish, red meat, and iron‑fortified cereals.
• Do not take vitamin C supplements > 500 mg/day (it increases iron absorption).
• Consume tea or coffee with meals – polyphenols can modestly reduce iron uptake.
• Maintain a healthy weight to lessen joint stress.
• Regular low‑impact exercise (e.g., swimming, cycling) to preserve joint mobility.
• Apply heat or cold packs to painful joints as needed.

Prevention

Because hereditary hemochromatosis is genetic, primary prevention is not possible, but the following measures can reduce the risk of iron overload and joint damage:

• Family screening: first‑degree relatives of a diagnosed individual should undergo serum ferritin/TS testing and genetic counseling.
• Early detection: periodic iron studies beginning at age 20–30 for at‑risk individuals.
• Dietary moderation of iron and vitamin C as described above.
• Avoid chronic alcohol excess, which accelerates liver injury and iron accumulation.
• Prompt treatment of infections or inflammatory conditions that can increase ferritin independently of iron load.

Living With Hemochromatosis (Arthropathy)

• Regular monitoring – check ferritin and transferrin saturation every 3–6 months during active phlebotomy, then annually once stable.
• Joint care – schedule routine rheumatology visits; consider physical therapy for range‑of‑motion exercises.
• Medication adherence – never skip scheduled phlebotomy appointments; keep a log of dates and lab results.
• Vaccinations – hepatitis A & B vaccines are recommended because liver disease increases infection risk.
• Support networks – patient advocacy groups (e.g., American Hemochromatosis Society) provide education and emotional support.
• Travel tips – carry a medical alert card indicating “Hereditary Hemochromatosis – Requires Phlebotomy” and a list of current medications.

When to Seek Emergency Care

Although most complications are managed electively, certain situations require immediate medical attention:

• Sudden, severe chest pain or shortness of breath – possible cardiac involvement or arrhythmia.
• Acute joint swelling with fever, redness, or inability to move the joint – could indicate septic arthritis.
• Rapidly worsening abdominal pain, jaundice, or confusion – signs of acute liver failure.
• Unexplained loss of consciousness or severe headache – potential neurologic complications from iron‑induced oxidative stress.
• Signs of severe anemia (dizziness, palpitations, fainting) after a phlebotomy session.