RESUMO
This paper aimed to report a rare case of fusion of 6th and 7th cervical vertebrae, called as block vertebrae. Block vertebrae was observed in the Department of Anatomy, SRM Dental College. The bodies of C6 and C7 were completely fused. Anterioposterior radiograph of the fused vertebrae bodies showed hypoplastic inter vertebral disc. Lateral radiograph showed partial fusion of articular processes on left but remain unfused at the right side. Congenital cervical vertebral fusion results due to non-segmentation of sclerotomes. It may be asymptomatic or may result in various clinical symptoms with limitation of neck movements. Knowledge about the variations in vertebrae especially in cervical region is essential for orthopedic surgeons, oral-maxillofacial surgeons and physical therapists for planning any surgeries involving the neck region.