Cervical rib
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Cervical ribs are supernumerary or accessory ribs arising from the seventh cervical vertebra. They occur in ~0.5% of the population, are usually bilateral, but often asymmetric 2, and are more common in females.
Related pathology
Although cervical ribs are usually asymptomatic, they are the most important anatomic rib variant clinically, because they can cause thoracic outlet syndrome by compression of the brachial plexus or subclavian artery/vein.
Differential diagnosis
-<p><strong>Cervical ribs</strong> are supernumerary or accessory ribs arising from the seventh <a href="/articles/cervical-vertebra">cervical vertebra</a>. They occur in ~0.5% of the population, are usually bilateral, but often asymmetric <sup>2</sup>, and are more common in females. </p><p>Although cervical ribs are usually asymptomatic, they are the most important <a href="/articles/anatomic-rib-variant">anatomic rib variant</a> clinically, because they can cause <a href="/articles/thoracic-outlet-syndrome">thoracic outlet syndrome</a> by compression of the <a href="/articles/brachial-plexus">brachial plexus</a> or subclavian <a title="Subclavian artery" href="/articles/subclavian-artery">artery</a>/<a title="Subclavian vein" href="/articles/subclavian-vein">vein</a>.</p><h4>Differential diagnosis</h4><ul><li><a title="First rib" href="/articles/first-rib">underdeveloped first thoracic rib</a></li></ul>- +<p><strong>Cervical ribs</strong> are supernumerary or accessory ribs arising from the seventh <a href="/articles/cervical-vertebra">cervical vertebra</a>. They occur in ~0.5% of the population, are usually bilateral, but often asymmetric <sup>2</sup>, and are more common in females.</p><h4>Related pathology</h4><p>Although cervical ribs are usually asymptomatic, they are the most important <a href="/articles/anatomic-rib-variant">anatomic rib variant</a> clinically, because they can cause <a href="/articles/thoracic-outlet-syndrome">thoracic outlet syndrome</a> by compression of the <a href="/articles/brachial-plexus">brachial plexus</a> or subclavian <a href="/articles/subclavian-artery">artery</a>/<a href="/articles/subclavian-vein">vein</a>.</p><h4>Differential diagnosis</h4><ul><li><a href="/articles/first-rib">underdeveloped first thoracic rib</a></li></ul>
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Case 124: rudimentary assymetricasymmetric cervical ribs
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