Sesamoid ossicles of the nuchal ligament
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Sesamoid ossicles of the nuchal ligament are a relatively common anatomical variant that are usually asymptomatic and most commonly occur at the C5-C6 or C6-C7 vertebral levels.
Epidemiology
They occur in ~7.5% of the population, with a male predominance of 3:1 1.
Radiographic features
Plain radiograph
- well-defined, corticated, round or oval opacity on lateral projection
CT
- cortical bone with central marrow within the nuchal ligament
Differential diagnosis
- myositis ossificans
- Clay-shoveler fracture
- calcareous bursitis
- nuchal fibrocartilaginous
pseudotumorpseudotumour - heterotrophy in the secondary nucleus of the C6 spinous process
- calcium hydroxyapatite deposition disease
-<li><a href="/articles/nuchal-fibrocartilaginous-pseudotumor">nuchal fibrocartilaginous pseudotumor</a></li>- +<li><a href="/articles/nuchal-fibrocartilaginous-pseudotumor">nuchal fibrocartilaginous pseudotumour</a></li>
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Image 6 X-ray (Lateral) ( create )
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