antineutrophil cytoplasmic antibody test

antineutrophil cytoplasmic antibody (ANCA) test

a blood test used to diagnose Wegener's granulomatosis. It is also used to follow the course of the disease, monitor its response to therapy, and detect early relapse.
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Further workup yielded negative results for antinuclear antibody, rheumatoid factor, and antineutrophil cytoplasmic antibody tests.