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Uptodate Reference Title
P-ANCA pattern on indirect immunofluorescence
P-ANCA pattern on indirect immunofluorescence
Demonstration of perinuclear antineutrophil cytoplasmic autoantibodies (P-ANCA) by indirect immunofluorescence with normal neutrophils. Staining is limited to the perinuclear region, and the cytoplasm is nonreactive. Among patients with vasculitis, the antibodies are usually directed against myeloperoxidase (MPO). However, a P-ANCA pattern can also be seen with autoantibodies against a number of other antigens including lactoferrin and elastase. Non-MPO P-ANCA can be seen in a variety of nonvasculitic disorders.