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a.1.(Anat.) Of or pertaining to the styloid and mastoid processes of the temporal bone.
References in periodicals archive ?
Surgical exploration identified a large tumor that involved the mastoid air cells from the mastoid antrum all the way up to the stylomastoid foramen.
Derived from the Greek word 'Stylos' meaning 'the pillar,' the styloid process is a slender bony structure that extends downward and forward from the inferior surface of the petrous part of the temporal bone anterior to the stylomastoid foramen.
The nerve exits the brain stem near the vestibulocochlear nerve, passes through petrous temporal bone and then exits the skull through stylomastoid foramen and splits into auricular, palpebral, and buccal branches.
While the typical course of the facial nerve after exiting the stylomastoid foramen is presented, there is potential for anatomical variation in each patient.
The chorda tympani nerve is the largest branch of the facial nerve in the intrapetrous compartment; it splits from the facial nerve just before it exits via the stylomastoid foramen.
Chung et al (10) point out that, on CT, a tumor near the posterolateral portion of the retromandibular vein, extending toward the stylomastoid foramen, should introduce the possibility of schwannoma into the differential diagnosis.
If the lesion is at the stylomastoid foremen it may result in facial paralysis only.
The right facial nerve was exposed and crushed at its exit from the stylomastoid foramen proximal to the bifurcation of the main trunk.
The first patient, a 48-year-old woman, presented with what appeared to be a parotid tumor at the stylomastoid foramen; she underwent a parotidectomy, transmastoid facial nerve decompression, and a shave biopsy of the tumor.
4) Facial nerve is susceptible to trauma as it exits from stylomastoid for a men where soft tissue compression can lead to damage of facial nerve (CHARGE Syndrome).