Definition:
Lupus nephritis is a kidney disorder that is a complication of systemic lupus erythematosus.
Alternative Names:
Nephritis - lupus; Lupus glomerular disease
Causes, incidence, and risk factors:
Systemic lupus erythematosus (SLE, or lupus) is an autoimmune disease. This means there is a problem with the body's immune system. Normally, the immune system helps protect the body from harmful substances. But in patients with an autoimmune disease, the immune system cannot tell the difference between harmful substances and healthy ones. As a result, the immune system attacks otherwise healthy cells and tissue. SLE may damage different parts of the kidney, leading to interstitial nephritis, nephrotic syndrome, and membranous GN. It may reapidly worsen to kidney failure. Lupus nephritis affects approximately 3 out of every 10,000 people. In children with SLE, about half will have some form or degree of kidney involvement. More than half of patients have not had other symptoms of SLE when they are diagnosed with lupus nephritis. SLE is most common in women ages 20 - 40. For more information, see: systemic lupus erythematosus.
References:
Nelson EG. Tubulointerstitial diseases. In: Goldman L, Ausiello D, eds. Cecil Medicine. 23rd ed. Philadelphia, Pa: Saunders Elsevier;2007:chap 123. Harris ED. Budd RC, Genovese MC, Firestein GS, Sargent JS, Sledge CB. Kelley's Textbook of Rheumatology. 7th ed. St. Louis, Mo: WB Saunders; 2005.
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