Microscopic polyangiitis
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| Microscopic polyangiitis Classification and external resources | |
| ICD-10 | M31.7 |
|---|---|
| DiseasesDB | 8193 |
| eMedicine | med/2931 |
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Overview
Microscopic polyangiitis (MPA) is an ill-defined autoimmune disease characterized by pauci-immune, necrotizing, small-vessel vasculitis without clinical or pathological evidence of necrotizing granulomatous inflammation. Because many different organ systems may be involved, a wide range of symptoms are possible in MPA.
Diagnosis
Laboratory tests show an increased sedimentation rate, reduced red blood count, antineutrophil cytoplasmic antibodies (p-ANCA) directed against [MPO(a constituent of neutrophil granules), and protein and red blood cells in the urine.
The test for anti-glomerular basement membrane antibody (GBM), which is positive in Goodpasture's syndrome, is negative.
Cause
This condition, the clinical picture of which may include many features of systemic lupus erythematosis, has been reported to have been caused by antibiotics and also by certain infections, though, as with many autoimmune diseases, the causes remain to a large extent unknown.
Treatment
The customary treatment involves long term dosage of prednisone, alternated or combined with cytotoxic drugs, such as cyclophosphamide or azathioprine. Plasmapheresis may also be indicated in the acute setting to remove ANCA antibodies.
See also
External links
Overview from Cleveland Clinic
nl:Microscopische polyangiitis
Acknowledgement and Attribution Regarding Sources of Content
Some of the initial content on this page may be incorporated in part from copyleft sources in the public domain including wikis such as Wikipedia and AskDrWiki. Drug information for patients came from the The National Library of Medicine. Infectious disease information may have come from the Centers for Disease Control (CDC). Differential Diagnoses are drawn from clinicians as well as an amalgamation of 3 sources: 1.The Disease Database; 2. Kahan, Scott, Smith, Ellen G. In A Page: Signs and Symptoms. Malden, Massachusetts: Blackwell Publishing, 2004:3; 3. Sailer, Christian, Wasner, Susanne. Differential Diagnosis Pocket. Hermosa Beach, CA: Borm Bruckmeir Publishing LLC, 2002:7 .
