Fig. 2
From: Pediatrics severe low back pain by disc herniation: an uncommon entity
CT images of the patient of the observation 2. CT in sagittal reconstruction, parenchymal window, passing through the spinal canal (a) showing a calcified L5S1 disc herniation in its upper part; CT in sagittal reconstruction, bony window, passing through the posterior articular (b) visualizing an undisplaced isthmic lysis of L5; CT in axial section, bony window passing through S1 showing an anomaly of closure of the posterior arch of S1 (spina bifida occulta) (c)