Fig. 1

A T2- weighted -magnetic resonance image of sagittal view from the lower lumbar spine to the sacrum. Solid arrows show the defect of the normal bony structures from the L5 level to the sacrum. The dashed arrow shows a spinal lipoma at the level of the sacrum. Two black arrows show the soft tissue continuity from the skin to the lipoma. Two white arrows show the segmented frontal sacrum. B Ultrasonographic image of sagittal view from the lower lumbar spine to the sacrum. Solid arrows show the defect of the normal bony structures of the sacrum. The dashed arrow shows a spinal lipoma at the level of the sacrum. Two black arrows show the soft tissue continuity from the skin to the lipoma