Fig. 1: Ultrastructural examination of GBM vasculature suggesting incomplete transcardial perfusion.

Transmission electron microscopy imaging of erythrocytes remaining in GBM vessel lumens after transcardial perfusion (a–c), compressed vessel lumens in GBM (d–f), and the lumens of normal brain capillaries from the contralateral hemisphere (g–i). Cells composing vessel walls are highlighted with  semitransparent cyan. Scale bars, 5 µm.