Results of immunohistochemical staining for CD59. Shown are results of immunohistochemical staining (concentration 1:1000) on paraffin sections of a sural nerve biopsy (original magnification, 60×) from a control subject (A) and from patient 2888 (B). There is endothelial (cytoplasmic-luminal pattern) staining of epineurial blood vessels (A; black arrow) in the control subject, whereas is a complete lack of vascular staining in the patient (B; black arrow).