Sagittal MRI T2 images of lumbo sacral region show a low signal intensity representing a coronal cleft of cartilaginous plate in the posterior portion of S1 vertebral body - a normal anatomical variation of no clinical significance.
Coronal cleft in the vertebral body is an anomaly resulting from a failure of fusion of the anterior and posterior ossification centres which remain separated by a cartilage plate.
Represents a delay in normal vertebral maturation.
In most cases clefts disappear by six months after birth. In some cases remains persistent.
Usually seen in the lower thonacic on lumbar vertebral bodies.
Radiographically, a vertical radiolucent band is seen just behind the mid portion of the body on the lateral view.