Scleroderma

Raynaud syndrome: one of the most characteristic manifestations of the condition (97% of cases), it is the first clinical expression in most patients. It is caused by vasoconstriction of the capillaries. Patients report that with the cold their fingers change colour and turn pale (like wax) first, then turn blue after a while and finally turn reddish. The presence of Raynaud syndrome is not always an indication of scleroderma. In reality, only 5% of people with Raynaud syndrome later develop the condition. Almost half of sufferers may have digital ulcers, as an expression of a severe microcirculatory injury.

The most peculiar manifestation of the disease is the way it affects the skin. It is hard, tight and wrinkle-free (hard to pinch). The extent of the skin condition varies and is related to the prognosis. Two clinical forms are distinguished: limited (distal skin condition to elbows and knees) and diffuse (distal and proximal skin condition to elbows and knees, and torso). The face can be affected equally in both clinical forms. The limited subtype has a better prognosis than the diffuse one. Reduced aperture of the mouth (microstomy) may also be seen. In the skin there are hyperpigmented and coloured areas, telangiectasia (accumulation of small blood vessels) and sometimes subcutaneous calcium deposits can be felt (calcinosis).

Symptoms

The most peculiar manifestation of the disease is the way it affects the skin. It is hard, tight and wrinkle-free (hard to pinch). The extent of the skin condition varies and is related to the prognosis. Two clinical forms are distinguished: limited (distal skin condition to elbows and knees) and diffuse (distal and proximal skin condition to elbows and knees, and torso). The face can be affected equally in both clinical forms. The limited subtype has a better prognosis than the diffuse one. Reduced aperture of the mouth (microstomy) may also be seen. In the skin there are hyperpigmented and coloured areas, telangiectasia (accumulation of small blood vessels) and sometimes subcutaneous calcium deposits can be felt (calcinosis).

 Most patients experience joint and muscle pain, and in extreme cases contraction and retraction of the fingers are observed. When the digestive tract is affected, which often happens, the patient complains of a burning sensation and difficulty swallowing, as the oesophagus has lost its ability to move food towards the stomach. Pulmonary disease is the leading cause of death and may occur in the form of fibrosis or pulmonary hypertension; coughing, choking and heart failure are the main manifestations of lung involvement. When the heart is affected, heart rhythm disturbances and in some cases symptoms of angina pectoris are detected, due to the involvement of the small coronary vessels. In a small percentage (about 5%) scleroderma alters the kidney (scleroderma renal crisis) and manifests itself as malignant arterial hypertension and kidney failure.

It should be noted that not all patients with scleroderma present all the manifestations described above. It can also be concluded that there is great, almost individual, variability in the clinical expression of the disease.

Who is affected by the condition?

Scleroderma is a rare disease with an incidence of 4-18.7/million/year and a prevalence of 31-286/million. It is more common in females, with a variable ratio, depending on the series, ranging from 3:1 to 14:1 (female/male). The age at which it presents is around 30-40 years.

Diagnosis

When the above symptomatology is clear, the diagnosis does not offer too much room for doubt. Various complementary tests are helpful in confirming diagnosis and in assessing the degree of involvement of the various organs that may be affected.

Typical treatment

“An incurable, but not untreatable condition”. There is currently no treatment for scleroderma that has satisfactory results, but this does not mean that it cannot be treated. Treatment is symptomatic, depending on the organ affected. For Raynaud syndrome: vasodilators, antiplatelets; gastro-oesophageal reflux: proton pump inhibitors; renal crisis: angiotensin converting enzyme inhibitors/dialysis; pulmonary fibrosis: immunosuppressants/lung transplant; pulmonary hypertension: vasodilators/lung transplant. In patients with the diffuse form and less than three years of evolution, immune modulators such as mycophenolate sodium (or mycophenolate mofetil) or methotrexate may be indicated as a basic treatment.

Typical tests

The most common tests to confirm and/or assess the degree of involvement of the various organs are: general analyses and immunological data (specific antinuclear antibodies); capillaroscopy, high-resolution computerised axial tomography scan of the chest, respiratory functional tests, oesophageal manometry and echocardiogram. In the follow-up for these patients, respiratory functional tests and an echocardiogram should be performed annually.