Fig. 5

Enostosis with adjacent vertebral vascular malformation. Axial CT image of the spine (a) demonstrates the enostosis as a sclerotic bone lesion (white arrow). MRI shows low signal intensity like cortical bone; hypointensity on T1- (d, white arrow) and T2- (b, white arrow) weighted images, without enhancement post contrast (c, e). There is an adjacent ill-defined lesion with lucencies and intervening thickened trabeculae (a, orange arrows). This lesion demonstrates T1/T2 hyperintense signal (b, d, orange arrows), fat suppression (c, e, orange arrows) and no enhancement post contrast (c, e, orange arrow). This lesion is consistent with a vertebral venous vascular malformation (formerly known as a hemangioma)