Abstract
A variety of antineutrophil cytoplasmic auto-antibodies (ANCAs) are known to be associated with small vessel vasculitides such as Wegener's granulomatosis and microscopic polyangiitis. To visualize colocalization patterns of the fibrinoid necrotic lesions and ANCA-antigens more accurately, we have developed a double staining technique in which an immunohistochemical staining is followed by a histological staining. Instead of using sequential biopsy slides of histologically and immunohistochemically stained sections, which may lead to an underestimation of the number and size of the lesions, our technique permits the visualization of the colocalized patterns of fibrinoid necrosis with an ANCA-antigen in a single slide. The double staining procedure is presented in this Technical Note.
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