ANCA testing in real-world clinical practice: diagnostic performance and predictive value in a Spanish cohort.
Antineutrophil cytoplasmic antibodies (ANCA) are a key biomarker for ANCA-associated vasculitis (AAV), particularly microscopic polyangiitis (MPA) and granulomatosis with polyangiitis (GPA). Although indirect immunofluorescence (IIF) has traditionally been the reference techniqu…