Petrosquamous fissure | definition of petrosquamous fissure by Medical dictionary
pet·ro·squa·mous fis·sure [TA]
a shallow fissure indicating externally the line of fusion of the petrous and squamous portions of the temporal bone.
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References in periodicals archive
The cartilaginous portion of the eustachian tube is located in the petrosquamous fissure
of the temporal bone, which is near the occipital and sphenoid bones.