Figure 11b. Vertebral hemangioendothelioma. (a) Axial T1-weighted MR image shows a vertebral hemangioendothelioma with the typical trabecular low-signal-intensity pattern (arrow). (b) High-power photomicrograph (original magnification, x400; H-E stain) shows endothelial cells (arrows) and inflammatory cells (arrowheads).