Figure 1 (A) C-ANCA using commercial neutrophil preparation; (B) C-ANCA using peripheral blood smear; (C) P-ANCA using commercial neutrophil preparation; (D) P-ANCA using peripheral blood smear; (E) ANA using peripheral blood smear. These photographs were taken at the same magnification and demonstrate that neutrophils are larger in peripheral blood smears (B, D, and E) than in commercial preparations (A and C) ANA, antinuclear antibodies; ANCA, antineutrophil cytoplasmic antibodies; C-ANCA, cytoplamic ANCA; P-ANCA, perinuclear ANCA.