CASE HISTORY / CLINIC:
Patient fell from window from the 1st floor.
Acute hearing impairment on right ear. Ear microscopy reveals hematotympanum without a tear in the eardrum. Lateralization to the right in Weber’s test. Rinne's test is negative on the right, positive on the left.


FINDINGS:
The cells of the petrous bone that are normally air-filled partially demonstrate hypodense opacity, indicating presence of blood.
Demonstration of a sharp line along the longitudinal axis of the petrous bone typical of a longitudinal fracture.


DIAGNOSIS:
Longitudinal fracture

DIFFERENTIAL DIAGNOSIS:
Vascular canals