A 40-year-old male patient, hit by a car two years ago, evolved with hypoacusis (hearing impairment) and tissue projecting into the left external auditory canal, detected by otoscopic examination.
A computed tomography revealed an oblique fracture of the left temporal bone associated with hypoattenuation of the adjacent cerebral parenchyma compatible with parenchymal contusion. Bone discontinuity of the tympanic tegmen with the presence of hypo attenuating material in the tympanic cavity and in the homolateral mastoid cells was also observed, this being non-specific to the method.
Subsequently submitted to a magnetic resonance of the skull, meningoencephalic content was distinguished within the tympanic cavity from the middle cranial fossa/tympanic tegmen, representing post-traumatic cephalocele.
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