One main type of lupus, cutaneous lupus erythematosus, is limited to skin symptoms, including a rash and lesions. That means people with cutaneous lupus, which does not progress and become systemic lupus erythematosus, only experience skin symptoms. People with cutaneous lupus most commonly develop a discoid rash. It appears as round, raised, red patches and can cause scarring, Dr. Caricchio explains. “It’s often confined to small areas above the neck, such as the ears and scalp,” he says. The rash usually does not itch or cause discomfort.
García-Carrasco M1, Mendoza-Pinto C, Cardiel MH, Méndez-Martínez S, García-Villaseñor A, Jiménez-Hernández C, Alonso-García NE, Briones-Rojas R, Ramos-Álvarez G, López-Colombo A. "Health related quality of life in Mexican women with systemic lupus erythematosus: a descriptive study using SF-36 and LupusQoL(C)." Lupus 21.11 Oct. 2012.
Testing for antibody to double-stranded DNA antigen (anti-dsDNA) and antibody to Sm nuclear antigen (anti-Sm) may be helpful in patients who have a positive ANA test but do not meet full criteria for the diagnosis of systemic lupus erythematosus. AntidsDNA and anti-Sm, particularly in high titers, have high specificity for systemic lupus erythematosus, although their sensitivity is low. Therefore, a positive result helps to establish the diagnosis of the disease, but a negative result does not rule it out.46 The CAP guideline recommends against testing for other autoantibodies in ANA-positive patients, because there is little evidence that these tests are of benefit.46
The most commonly sought medical attention is for joint pain, with the small joints of the hand and wrist usually affected, although all joints are at risk. More than 90 percent of those affected will experience joint or muscle pain at some time during the course of their illness. Unlike rheumatoid arthritis, lupus arthritis is less disabling and usually does not cause severe destruction of the joints. Fewer than ten percent of people with lupus arthritis will develop deformities of the hands and feet. People with SLE are at particular risk of developing osteoarticular tuberculosis.
Drug-induced lupus erythematosus is a (generally) reversible condition that usually occurs in people being treated for a long-term illness. Drug-induced lupus mimics SLE. However, symptoms of drug-induced lupus generally disappear once the medication that triggered the episode is stopped. More than 38 medications can cause this condition, the most common of which are procainamide, isoniazid, hydralazine, quinidine, and phenytoin.
Autoantibodies directed against various nuclear antigens including DAutoantibodies directed against various nuclear antigens including DNA, RNA, histones, acidic nuclear proteins, or complexes of these molecular elements. Antinuclear antibodies are found in systemic autoimmune diseases including systemic lupus erythematosus, Sjogren’s syndrome, scleroderma, polymyositis, and mixed connective tissue disease. Autoantibodies directed against various nuclear antigens including DNA, RNA, histones, acidic nuclear proteins, or complexes of these molecular elements. Antinuclear antibodies are found in systemic autoimmune diseases including systemic lupus erythematosus, Sjogren’s syndrome, scleroderma, polymyositis, and mixed connective tissue disease.
An inflammatory response (inflammation) occurs when tissues are injured by bacteria, trauma, toxins, heat, or any other cause. The damaged cells release chemicals including histamine, bradykinin, and prostaglandins. These chemicals cause blood vessels to leak fluid into the tissues, causing swelling. This helps isolate the foreign substance from further contact with body tissues.
Heart and Lungs. Heart and lung involvement often is caused by inflammation of the covering of the heart (pericardium) and lungs (pleura). When these structures become inflamed, patients may develop chest pain, irregular heartbeat, and accumulation of fluid around the lungs (pleuritis or pleurisy) and heart (pericarditis). The heart valves and the lung itself can also be affected by lupus, resulting in shortness of breath.
Sometimes changes in blood counts may contribute to symptoms of fatigue (low red blood cell count, anemia), serious infections (low white blood cell count), or easy bruising (low platelet count). However, many patients do not have symptoms that indicate blood abnormalities, so it is important for lupus patients to have periodic blood tests in order to detect any problems.
For instance, a dermatologist for cutaneous lupus (skin disease), a cardiologist for heart disease, a nephrologist for kidney disease, a neurologist for brain and nervous system disease, or a gastroenterologist for gastrointestinal tract disease. A woman with lupus who is considering a pregnancy needs an obstetrician who specializes in high-risk pregnancies.
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