(Figure 1.) A high resolution CT scan of the temporal bone revealed bilateral transverse temporal bone fractures involving the otic capsules with evidence of a bilateral pneumolabyrinth (Fig. In trauma patients with opacified mastoid air cells on head CT images, it should be assumed that a temporal bone fracture is present until proved otherwise. If a temporal bone fracture is clinically suspected, additional imaging studies (ie, temporal bone multidetector CT) may depict the fracture. Axial HRCT disclosed 63 longitudinal, 13 transverse, 10 complex and 3 atypical fractures.

TYPES OF FRACTURES. ... the mastoid foramen is situated near the posterior border and transmits a vein to the transverse sinus and a small branch of the occipital artery to the dura mater. Some fractures may have characteristics of both patterns. The transverse fracture is oriented perpendicular to the petrous pyramid (arrow, b) and traverses the basal turn of the cochlea (arrowhead, b).

Most cases of temporal bone fracture involve severe body and/or head trauma. The diagnosis of a temporal bone fracture was established by axial HRCT in almost every case. A temporal bone fracture generally requires very strong forces to the skull that occur either laterally or in an anterior or posterior ear direction. The mastoid part of the temporal bone is the back part of the temporal bone. Figure 1a: Temporal bone fractures are typically secondary to high energy impact, and are classically classified according to the direction of the fracture lines , : longitudinal, transverse, and mixed. Temporal Bone Fracture.

Head injury is a major cause of Temporal bone fracture. Fig. 1). 4). Temporal bone fractures have been classified by orientation with respect to the long axis of the petrous portion of the temporal bone. The fracture line extended to the internal auditory canal on the left side and was associated with a pneumocephalus in the internal auditory canal. Temporal bone fractures can be categorised* as either longitudinal or transverse (many are mixed), depending on their relation to the axis of the ear canal: The longitudinal fracture is parallel to the long axis of the petrous pyramid (arrow, a) and traverses the mastoid portion of the temporal bone. Temporal bone fractures were previously classified as longitudinal or transverse.

Patients presenting with a head injury and suspected temporal bone fracture need prompt investigation and management.CT imaging provides the initial mainstay of investigation (Fig. A total of 84 patients with 89 fractures of the temporal bone were examined with high resolution CT (HRCT) a few hours to 21 months after the initial trauma.

Longitudinal fractures make up 70 to 90% of temporal bone fractures, and transverse fractures make up 10 to 30%. Recently, a newer classification system of temporal bone fractures includes subcategories for petrous region fractures and the degree of involvement of the otic capsule [3] .

This patient had a CT scan of the temporal bone, which found a temporal bone fracture.

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