Scleroderma

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Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]; Associate Editor-In-Chief: Cafer Zorkun, M.D., Ph.D. [2]

For patient information click here

Synonyms and keywords: Systemic sclerosis

Diagnosis

Diagnosis is by clinical suspicion, presence of autoantibodies (specifically anti-centromere and anti-scl70/anti-topoisomerase antibodies) and occasionally by biopsy. Of the antibodies, 90% have a detectable anti-nuclear antibody. Anti-centromere antibody is more common in the limited form (80-90%) than in the systemic form (10%), and anti-scl70 is more common in the diffuse form (30-40%) and in African-American patients (who are more susceptible to the systemic form).

In 1980 the American College of Rheumatology agreed upon diagnostic criteria for scleroderma.

Diffuse scleroderma can cause musculoskeletal, pulmonary, gastrointestinal, renal and other complications.Patients with larger amounts of cutaneous involvement are more likely to have involvement of the internal tissues and organs.

Therapy

There is no cure for every patient with scleroderma, though there is treatment for some of the symptoms, including drugs that soften the skin and reduce inflammation. Some patients may benefit from exposure to heat.

Digital ulcerations and pulmonary hypertension can be helped by prostacyclin (iloprost) infusion. Iloprost being a drug which increases blood flow by relaxing the arterial wall.

Topical/symptomatic

Topical treatment for the skin changes of scleroderma do not alter the disease course, but may improve pain and ulceration. A range of NSAIDs (nonsteroidal anti-inflammatory drugs) can be used to ease painful symptoms, such as naproxen. There is limited benefit from steroids such as prednisone. Episodes of Raynaud's phenomenon sometimes respond to nifedipine or other calcium channel blockers; severe digital ulceration may respond to prostacyclin analogue iloprost, and the dual endothelin-receptor antagonist bosentan may be beneficial for Raynaud's phenomenon. The skin tightness may be treated systemically with methotrexate and cyclosporin. If there is esophageal dysmotility (in CREST or systemic sclerosis), care must be taken with NSAIDs as they are gastric irritants, and so a proton pump inhibitor (PPI) such as omeprazole can be given in conjunction.

Kidney disease

Scleroderma renal crisis, the occurrence of acute renal failure and malignant hypertension (very high blood pressure with evidence of organ damage) in people with scleroderma, is effectively treated with drugs from the class of the ACE inhibitors. The benefit of ACE inhibitors extends even to those who have to commence dialysis to treat their kidney disease, and may give sufficient benefit to allow the discontinuation of renal replacement therapy. ACE inhibitors are also used for prophylaxis, and renal transplantation. Transplanted kidneys are known to be affected by scleroderma and patients with early onset renal disease (within one year of the scleroderma diagnosis) are thought to have the highest risk for recurrence.

Lung disease and pulmonary hypertension

Active alveolitis is often treated with pulses of cyclophosphamide, often together with a small dose of steroids. The benefit of this intervention is modest.

Pulmonary hypertension may be treated with epoprostenol, bosentan and possibly aerolized iloprost.

Experimental treatments

Given the difficulty in treating scleroderma, treatments with a smaller evidence base are often tried to control the disease. These include antithymocyte globulin and mycophenolate mofetil; some reports have reported improvements in the skin symptoms as well as delaying the progress of systemic disease, but neither of them have been subjected to large clinical trials.

While still experimental (given its high rate of complications), hematopoietic stem cell transplantation is being studied in patients with severe systemic sclerosis; improvement in life expectancy and severity of skin changes has been noted.

Case Examples

Case #1

Clinical Summary

A 29-year-old black female had a history of scleroderma involving the lung, kidney, heart, and skin. Her main clinical problems centered on her restrictive lung disease. She was able to live at home with supplemental oxygen but recently she had developed edema, chest pain, weakness, lightheadedness, and a loss of appetite. The patient was admitted to the hospital with a working diagnosis of congestive heart failure brought on by her lung disease.

Echocardiographic evaluation revealed a pericardial effusion that was tapped. Soon after this procedure her respiratory status degenerated and she required intubation. Despite aggressive supportive treatment for her cardiac and pulmonary problems, she could not be weaned from the ventilator. Two weeks after admission she became febrile and Gram positive cocci were isolated from sputum culture. She was placed on antibiotics but her condition deteriorated and she developed bradycardia followed by electromechanical dissociation (EMD).

Autopsy Findings

Upon opening the thorax there was 600 cc of cloudy serous fluid in each hemithorax and 100 cc of similar fluid in the pericardial sac. The heart weighed 530 grams and there was thickening of both the left and right ventricular walls. The liver weighed 1880 grams and was congested. The spleen weighed 200 grams and was also congested. The combined lung weight was 1875 grams; the lungs were markedly fibrotic with severe emphysema. In addition, dermal thickening was evident throughout the body and the wall of the esophagus was thickened and firm.

Histopathological Findings

Images courtesy of Professor Peter Anderson DVM PhD and published with permission © PEIR, University of Alabama at Birmingham, Department of Pathology

This is a gross photograph of cut section of the lungs from this patient. Note the extensive fibrosis of the lung parenchyma.

This is a gross photograph of a cut section of one lung from this patient. Note the extensive fibrosis lower lobe (arrows).

This is a closer view of the cut section of lung from this patient. Note the extensive fibrosis and the severe emphysematous changes.

This is a closer view of the cut section of lung from this patient showing the extensive fibrosis and the severe emphysematous change.

This is a gross photograph of the heart from this case. There is thickening of the left ventricular wall and some thickening of the right ventricle as well.

External links

• Goldminer: Scleroderma
• DermnetNZ: Systemic sclerosis
• Juvenile Scleroderma Network
• Juvenile Systemic Sclerosis
• Scleroderma Foundation
• Scleroderma Society of Ontario
• International Scleroderma Network
• The Scleroderma Research Foundation
• UK Scleroderma Society
• Scleroderma Information from Johns Hopkins University