A 29-year-old woman came with the complaint of pain in the neck for the past four years, which aggravates with movement
Lateral radiograph of the cervical spine shows fusion of the C5, C6, and C7 vertebral bodies with fusion of the intervening disc spaces. The fused segment demonstrates a characteristic waist-like anterior concavity (“wasp-waist” or "hour glass" appearance). The vertebral body heights are normal.