Fig. 1

Case 1. Sagittal T2-weighted (a), sagittal fat suppressed T2-weighted (b), sagittal fat suppressed T1-weighted post-contrast (c) images showing an epidural mass at L3–L4 level. The mass is T2 hyperintense, hypointense in fat suppressed T2 and showed no enhancement in post-contrast images. The mass is low signal in DWI (d) and high signal in ADC (e), axial image of dynamic contrast enhanced image (f) showing no obvious diffusion restriction (f) and time-intensity curve (g) showed no enhancement. A grey yellowish mass was resected after surgery (h). Histological sections (i) shows tumor is composed of abundant vascular channel filled with red blood cells and fibrin thrombi and mature adipose tissue