Ossified stylohyoid ligament
Patient got a hit on the right eye during a street fight. No loss off consciousness. Soft tissue swelling around the right eye. The doctor in the ER requests a maxillofacial CT scan, to rule out any fractures.
CT MAXILLOFACIAL AREA
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Soft tissue swelling around the orbita, without associated bony lesion or intracranial lesion. No intracranial lesions. Peripheral mucosal thickening of the maxillary, ethmoid and frontal sinuses: inflammatory changes.
Bilateral partially ossified stylohyoid ligament: incidental finding, asymptomatic. However, when symptomatic, known as the Eagle syndrome.
The normal length of the styloid process is about 2.5 cm, while an elongated styloid process is over 2.5 cm to 3 cm in length. The etiology of this stylohyoid ligament calcification is unclear.
However asymptomatic in this patient, Eagle syndrome can cause a combination of symtoms due to compression of cranial nerves (V, VII, IX, X) and the carotid artery; such as facial pain, dysphagia, tinnitus, syncope, carotidynia etc.
- Murtagh RD, Caracciolo JT, Fernandez G. CT findings associated with Eagle syndrome. AJNR Am J Neuroradiol. 2001;22 (7): 1401-2