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Lupus erithematosus is a name given to a collection of autoimmune diseases, in which the human immune system becomes hyperactive and attacks normal, healthy tissues.[1] Symptoms of these diseases can affect many different body systems, including joints, skin, kidneys, blood cells, heart, and lungs.

Lupus erythematosus may manifest as a systemic disease or in a purely cutaneous form. Lupus has four main types:

systemic
discoid
drug-induced
neonatal.

Of these, systemic lupus erythematosus (also known as SLE) is the most common and serious form.