Sinus of Morgagni (pharynx)

For Sinus Morgagni of the aorta, see Aortic sinus.

In the pharynx, the sinus of Morgagni is the enclosed space between the upper border of the superior pharyngeal constrictor muscle, the base of the skull and the pharyngeal aponeurosis.[1] In nasopharyngeal carcinoma, the tumor may extend laterally and involve this sinus involving the mandibular nerve. This produces a triad of symptoms known as Trotter's Triad. These symptoms are:

1) Conductive deafness (due to eustachian tube involvement)
2) Ipsilateral immobility of the soft palate
3) Trigeminal neuralgia

References

  1. ↑ Gray's Anatomy 1918, Chapter: The Pharynx


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