MRI � Spinal Epidural Hematoma: This 28-month-old boy presented with two weeks of progressive lower extremity weakness and refusal to stand or walk. Examination revealed moderate tenderness to palpation over the thoracic spine, bilateral lower extremity weakness and decreased sensitivity to light touch in the lower extremities and torso. The T2-weighted sagittal MR image of the thoracic spine (left) shows a high-signal extradural fluid collection extending between levels T-1 and T-4. Note the mass effect and compression of the dural sac. The T2-weighted axial MR image (right) shows a hyperintense crescent-shaped fluid collection at the T2 spinal segment posterior to the cord and the adjacent exiting nerve roots.