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  Indian J Med Microbiol
 

Figure 1: Antero-posterior radiograph of lumbo-sacral spine. Fusion of sacroiliac joints, vertebrae with bridging syndesmophytes (shown by arrows), dagger sign (ossification of anterior longitudinal ligament and interspinous ligament) and tram track sign (syndesmophytes and ossified ligaments looking like tram tracks) are seen

Figure 1: Antero-posterior radiograph of lumbo-sacral spine. Fusion of sacroiliac joints, vertebrae with bridging syndesmophytes (shown by arrows), dagger sign (ossification of anterior longitudinal ligament and interspinous ligament) and tram track sign (syndesmophytes and ossified ligaments looking like tram tracks) are seen