Trident sign (osmotic demyelination)
Updates to Article Attributes
The trident sign describes the typical appearances of the pons in osmotic demyelination syndrome, whereby the symmetrical high T2/FLAIR signal abnormality centrally in the pons is shaped like a trident, the three-pronged spear of classical Greece 1. The predominant involvement of the transverse pontine fibres and relative sparing of the descending corticospinal tracts is responsible for this characteristic ‘trident’ shaped appearance (omega sign) 2.
History and Entomologyetymology
The trident is most commonly associated witha three-pronged lance employed for spearing fish, and in Classical mythology was the weapon born by sea gods, such as the sea god Poseidon in Greek mythology orAncient Greece (or Neptune, the classical Roman equivalent). Although a similar weapon, the trishoola, with rounded tines, is also seen being carried in the Roman mythologyimages of Hindu gods, e.g. Shiva and Durga 1,3.
-<p>The <strong>trident sign</strong> describes the typical appearances of the pons in <a href="/articles/osmotic-demyelination-syndrome">osmotic demyelination syndrome</a>, whereby the symmetrical high T2/FLAIR signal abnormality centrally in the pons is shaped like a trident, the three-pronged spear of classical Greece <sup>1</sup>. The predominant involvement of the transverse pontine fibres and relative sparing of the descending corticospinal tracts is responsible for this characteristic ‘trident’ shaped appearance (omega sign) <sup>2</sup>.</p><h4>History and Entomology</h4><p>The trident is most commonly associated with the sea god Poseidon in Greek mythology or Neptune in the Roman mythology.</p>- +<p>The <strong>trident sign</strong> describes the typical appearances of the pons in <a href="/articles/osmotic-demyelination-syndrome">osmotic demyelination syndrome</a>, whereby the symmetrical high T2/FLAIR signal abnormality centrally in the pons is shaped like a trident, the three-pronged spear of classical Greece <sup>1</sup>. The predominant involvement of the transverse pontine fibres and relative sparing of the descending corticospinal tracts is responsible for this characteristic ‘trident’ shaped appearance (omega sign) <sup>2</sup>.</p><h4>History and etymology</h4><p>The trident is a three-pronged lance employed for spearing fish, and in Classical mythology was the weapon born by sea gods, such as the sea god Poseidon in Ancient Greece (or Neptune, the classical Roman equivalent). Although a similar weapon, the trishoola, with rounded tines, is also seen being carried in images of Hindu gods, e.g. Shiva and Durga <sup>1,3</sup>.</p>
References changed:
- 3. Agrawal A. Musculoskeletal colloquialisms based on weapons. (2017) Journal of clinical orthopaedics and trauma. 8 (1): 1-10. <a href="https://doi.org/10.1016/j.jcot.2016.07.006">doi:10.1016/j.jcot.2016.07.006</a> - <a href="https://www.ncbi.nlm.nih.gov/pubmed/28360488">Pubmed</a> <span class="ref_v4"></span>
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