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|Classification and external resources|
|ICD-10||L93 (ILDS L93.010)|
Lupus erythematosus is a name given to a collection of autoimmune diseases in which the human immune system becomes hyperactive and attacks healthy tissues.Symptoms of these diseases can affect many different body systems, including joints, skin, kidneys, blood cells, heart, and lungs. The most common and severe form is systemic lupus erythematosus.
Of these, systemic lupus erythematosus (also known as SLE) is the most common and serious form.
A more thorough categorization of lupus includes the following types:
Symptoms vary from person to person, and may come and go. Almost everyone with lupus has joint pain and swelling. Some develop arthritis. Frequently affected joints are the fingers, hands, wrists, and knees. Other common symptoms include:
Photosensitivity is a known symptom of lupus, but its relationship to and influence on other aspects of the disease remain to be defined. Causes of photosensitivity may include:
It is typically believed that Lupus is influenced by multiple genes. Lupus is usually influenced by gene polymorphisms, 30 of which have now been linked with the disorder. Some of these polymorphisms have been linked very tentatively however, as the role that they play or the degree to which they influence the disease is unknown. Other genes that are commonly thought to be associated with Lupus are those in the Human leukocyte antigen (HLA) family, which are largely related to healthy functioning of the immune system. There have been several cases where a single gene influence appears to be present, but this is rare. When a single gene deficiency does cause Lupus, it is usually attributed to the genes C1, C2, or C4. The influence of sex chromosomes and environmental factors are also noteworthy. Usually, these factors contribute to Lupus by compromising the immune system.
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