Lupus nephritis overview

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Overview

Historical Perspective

Classification

Pathophysiology

Causes

Differentiating Lupus nephritis from other Diseases

Epidemiology and Demographics

Risk Factors

Screening

Natural History, Complications and Prognosis

Diagnosis

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Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]; Associate Editor(s)-in-Chief:

Overview

Historical Perspective

Lupus Nephritis was first discovered by Osler and Jadassohn, two physicians, in 1948 by the discovery of the LE cell in 1948. The word "lupus" means wolf in Latin, as the destructive injuries SLE causes brought to mind wolf bites. The history of lupus erythematosus can be divided into three periods: classical, neoclassical, and modern. The classical period mostly refers to ancient history, when there was no exact definition of the disease. During the neoclassical lupus era, scientists investigated the manifestations of lupus and worked to define the disease's action. Modern history is mostly focused on a microscopical understanding of the disease and pathogenesis of SLE.

Classification

Lupus nephritis may be classified according to the Renal Pathology Society/International Society of Nephrology (RPS/ISN) classification which includes minimal mesangial lupus nephritis (class I), mesangial proliferative lupus nephritis (class II), focal lupus nephritis (class III), diffuse lupus nephritis (class IV), lupus membranous nephropathy (class V) and advanced sclerosing lupus nephritis (class VI)

Pathophysiology

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.

Causes

There are no established direct causes of systemic lupus erythematosus. Common contributory factors in the development of systemic lupus erythematosus include geneticpredisposition, auto-immune diseases, and use of drugs. Less common factors include environmental factors and exposure to ultraviolet (UV) light.

Differentiating Hereditary pancreatitis from Other Diseases

Lupus nephritis must be differentiated from other glomerular diseases that may cause hematuria, proteinuria, or renal failure. The various types of glomerular diseases should be differentiated from each other based on associations, presence of pitting edema, hemeturia, hypertension, hemoptysis, oliguria, peri-orbital edema, hyperlipidemia, type of antibodies, light and electron microscopic features. The following table differentiates between various types of glumerular diseases.

Epidemiology and Demographics

The incidence of lupus nephritis is 34 to 51 percent in Blacks, 31 to 43 percent in Hispanics, 33 to 55 percent in Asians, and 14 to 23 percent in Whites. In 2005, Incidence was fiund to be 5.1 (Overall), 1.9 (Adult men), 8.2 (Adult women).The incidence of Lupus nephritis increases with age upto 50 years; the median age at diagnosis is 25 years.Chronic disease name is usually first diagnosed among middle age patients. African Americans have a higher frequency of developing Lupus nephritis in the United States.

Risk Factors

Common risk factors in the development of Lupus nephritis may be occupational, environmental, genetic, and viral.

Screening

According to the United States Preventive Services Task Force, screening for systemic lupus erythematosus is not recommended.

Natural History, Complications, and Prognosis

Common complications of Lupus nephritis include microscopic hematuria, nephrotic syndrome, celluar casts, elevated creatnine and destruction of more than 50% of glomeruli.

Diagnosis

Diagnostic Criteria

History and Symptoms

Physical Examination

Laboratory Findings

Electrocardiogram

X-ray

Ultrasound

CT scan

MRI

Other Imaging Findings

Other Diagnostic Studies

Treatment

Medical Therapy

Surgery

Primary Prevention

Secondary Prevention

References


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