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] Structures passing through this sinus are: 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.
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