Differentiating Between HEDS and Fabry Disease

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When patients present with symptoms like joint pain, fatigue, or skin changes, doctors face a challenge: is it hypermobile Ehlers-Danlos syndrome (HEDS) or Fabry disease? Both conditions share some overlapping signs but require very different treatments and management. Understanding how to tell these two apart is crucial for timely diagnosis and effective care.

This guide breaks down the key differences between HEDS and Fabry disease, helping patients, caregivers, and healthcare providers recognize which condition might be at play.

What Are HEDS and Fabry Disease?

Hypermobile Ehlers-Danlos syndrome (HEDS) is a genetic connective tissue disorder. It mainly affects the joints, skin, and blood vessels, causing joint hypermobility, frequent dislocations, and stretchy skin. People with HEDS often experience chronic pain and fatigue.

Fabry disease is a rare inherited disorder caused by a deficiency of the enzyme alpha-galactosidase A. This leads to the buildup of a fatty substance called globotriaosylceramide in various organs. Fabry disease affects the kidneys, heart, nervous system, and skin, causing a wide range of symptoms.

Joint and Musculoskeletal Symptoms

• HEDS

- Marked joint hypermobility is the hallmark.

- Frequent joint dislocations or subluxations.

- Chronic musculoskeletal pain, often worsening with activity.

- Soft, velvety, and sometimes stretchy skin.

- Early onset of osteoarthritis in some cases.

• Fabry Disease

- Joint hypermobility is not typical.

- Muscle pain or cramps may occur but are less common.

- Bone and joint problems are usually not prominent.

Skin Manifestations

• HEDS

- Skin is soft, mildly stretchy, and fragile.

- Easy bruising is common.

- Slow wound healing may occur.

• Fabry Disease

- Characteristic skin lesions called angiokeratomas appear. These are small, dark red to purple spots, often clustered around the lower trunk and groin.

- These lesions are a key diagnostic clue.

Neurological and Pain Symptoms

• HEDS

- Chronic widespread pain is common.

- Fatigue and headaches may be present.

- No specific nerve damage.

• Fabry Disease

- Neuropathic pain, especially burning or tingling sensations in hands and feet (acroparesthesias).

- Episodes of severe pain crises triggered by stress, temperature changes, or exercise.

- Possible hearing loss or tinnitus.

Organ Involvement

• HEDS

- Usually no major organ involvement.

- Cardiovascular complications are rare but possible in some EDS types (not typical in HEDS).

• Fabry Disease

- Progressive kidney damage leading to renal failure.

- Heart problems such as hypertrophy, arrhythmias, and valve abnormalities.

- Stroke or transient ischemic attacks can occur at a young age.

Clinical Evaluation

Doctors start with a detailed history and physical exam. The presence of joint hypermobility using the Beighton score supports HEDS. Angiokeratomas and neuropathic pain point toward Fabry disease.

Laboratory Tests

• HEDS

- No specific blood test confirms HEDS. Diagnosis is clinical.

- Genetic testing can help exclude other EDS types.

• Fabry Disease

- Enzyme assay measuring alpha-galactosidase A activity in blood or leukocytes.

- Genetic testing confirms mutations in the GLA gene.

Imaging and Organ Assessment

• HEDS

- Imaging may show joint damage or early arthritis.

- Echocardiogram usually normal.

• Fabry Disease

- Kidney function tests and imaging to assess damage.

- Cardiac MRI or echocardiogram to detect heart involvement.

- Brain MRI may reveal white matter changes.

Treatment Differences

• HEDS

- Focus on physical therapy to strengthen muscles and stabilize joints.

- Pain management with medications and lifestyle changes.

- Avoidance of activities that cause joint injury.

• Fabry Disease

- Enzyme replacement therapy (ERT) to replace deficient enzyme and reduce substrate buildup.

- Symptom management for pain, kidney, and heart issues.

- Regular monitoring of organ function.

Why Accurate Diagnosis Matters

Misdiagnosing Fabry disease as HEDS or vice versa delays proper treatment. Fabry disease requires specific enzyme therapy to prevent organ damage, while HEDS management focuses on joint care and pain relief. Early diagnosis improves quality of life and long-term outcomes.

• Keep a detailed symptom diary noting pain type, skin changes, and any organ-related symptoms.

• Share family history of similar symptoms or known genetic conditions with your doctor.

• Ask about enzyme testing if Fabry disease is suspected.

• Seek evaluation by specialists familiar with connective tissue disorders and rare metabolic diseases.

• Join patient support groups for shared experiences and resources.