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 Indian J Med Microbiol  
 

Figure 7 (A and B): Os odontoideum: Sagittal CT image (A) T1W MRI (B) in a 17 year old patient with quadriparesis showing rounded bony fragment lying above and anterior to the base of dens. Dens is hypoplastic, smooth and well corticated and anterior arch is hypertrophied (arrow) and rounded differentiating the condition from fracture. MR also revealed marked ligament thickening, spinal canal narrowing with cord compression and myelomalacic changes

Figure 7 (A and B): <i>Os odontoideum</i>: Sagittal CT image (A) T1W MRI (B) in a 17 year old patient with quadriparesis showing rounded bony fragment lying above and anterior to the base of dens. Dens is hypoplastic, smooth and well corticated and anterior arch is hypertrophied (arrow) and rounded differentiating the condition from fracture. MR also revealed marked ligament thickening, spinal canal narrowing with cord compression and myelomalacic changes