Normal apical ligament (arrow) and normal anterior atlantoaxial ligament (arrowhead) in the diagram (A) and the midsagittal T2-weighted MR image (B) in.

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High-signal-intensity lesions on T2-weighted MR images

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Presentation transcript:

Normal apical ligament (arrow) and normal anterior atlantoaxial ligament (arrowhead) in the diagram (A) and the midsagittal T2-weighted MR image (B) in a 45-year-old woman with rheumatoid arthritis. Normal apical ligament (arrow) and normal anterior atlantoaxial ligament (arrowhead) in the diagram (A) and the midsagittal T2-weighted MR image (B) in a 45-year-old woman with rheumatoid arthritis. Note the widened atlantodental interval (4 mm). S.-C. Hung et al. AJNR Am J Neuroradiol 2010;31:838-843 ©2010 by American Society of Neuroradiology