Figure 2: Magnetic resonance imaging of lumbar spine, axial T2-weighted images (a-c), axial T2-weighted fat spin echo (FSE) image (d). (a) Axial magnetic resonance images showing a heterointense mass-like lesion (arrowheads) located in the posterolateral spinal canal around left L5/S1 facet joint with left S1 root compression (arrows). (b and c) Gradual resolution of hematoma was observed at 3 months (b) and 9 months (c) after conservative treatment. (d) The axial image shows complete resolution of hematoma at 4-year follow-up