The transverse cable was found to be dense with WBCs. (A) SEM of the transverse cable densely decorated with WBCs (red circles). (B) Density of WBCs on the thrombus. The upstream of the transverse cable was denser in WBCs (mean ± standard deviation [SD], n = 10 for both upstream and downstream; t(18) = 2.25; P = .037, 2-tailed t test). (C) Density of WBCs on the transverse cable per 10μm slice. The transverse cable was rich in WBCs, whereas the rest of the thrombus area was sparce of WBCs (mean ± SD, n = 20 for transverse cable and n = 76 for rest; P = 1 × 10^–11, Mann-Whitney U test), indicating that the cable filtered WBCs like a net. (D) High-magnification images showing upstream WBCs on the cable; (E) downstream on the cable; and (F) in the rest region, where WBC is attached to collagen and an islet.