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Antineutrophil Cytoplasmic Antibodies (ANCA) Blood Test

The ANCA Blood Test is used to detect Antineutrophil cytoplasmic autoantibodies which (ANCA) are a serological marker associated with vasculitis and glomerulonephritis.

Sample Report

Test Code: 162388

Also Known As: ANCA

Methodology: Indirect fluorescent antibody (IFA)

Preparation: No special preparation required.

Test Results: 1-2 days. May take longer based on weather, holiday or lab delays.

Description

 

Specifically, ANCA have been found (at frequencies ranging from 70% to 90%) in patients with active Wegener granulomatosis, microscopic polyarteritis nodosa, and idiopathic crescentic glomerulonephritis (with manifestations ranging from kidney-limited disease to extrarenal systemic disease, including pulmonary-renal syndromes). Glomerular lesions in patients with ANCA-associated systemic vasculitis or renal-limited disease are virtually identical. Normal controls are negative for ANCA and <10% of patients with other renal diseases are positive. ANCA may be directly involved in the pathogenesis of the vascular injury that causes the clinical manifestations in ANCA-associated disease. 

 

Antineutrophil cytoplasmic autoantibodies exhibiting pANCA or cANCA patterns are detected using indirect immunofluorescent antibody (IFA) techniques with a substrate of ethanol-fixed human neutrophils. Positive patient sera with perinuclear or nuclear patterns are repeated using a formalin-fixed substrate in order to differentiate the presence of true pANCA antibodies from possible interference with antinuclear antibodies (ANA).

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