Figure 1From: Operative management of a non-traumatic cervico-thoracic spondylolisthesis: a case report Lateral radiograph of the cervical spine shows a spondylolisthesis at C7-T1 (preoperative); the sagittal diameter of T1 (A) was 22.6 mm and the horizontal displacement (B) between C7 and T1 was 13 mm. Back to article page