Tympanosquamosal fissure

Case contributed by Assoc Prof Frank Gaillard
CT

Prominent petrotympanic fissure on the right. 

CT

The arrow shows the tympanosquamosal fissure which is the lateral continuation of the petrotympanic fissure.

Case Discussion

Prominent petrotympanic fissure not to be confused with a fracture.

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