Pitfalls by radiological diagnosis of zygoma.

概要

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Normal variants in the radiological diagnosis of the zygomatic bone and its close proximity were investigated. Normal variants are classified into two major groups, i. e., superimposed suture lines simulating fracture lines and radiolucencies simulating bone destructions.Radiolucencies are classified into two subgroups, i. e., radiolucencies due to the zygomatic bone itself and radiolucencies due to superimposed ones from the such posterior structures as Ala magna of the sphenoid bone and Pars squamosa of the temporal bone.By Caldwell's view, superimposed suture lines were seen in 4.0%, radiolucencies of the zygoma itself in 8.7%, and superimposed radiolucencies in 0.8%.By Waters'view, radiolucencies of the zygoma itself in 4.0% and superimposed radiolucencies in 2.1%.Radiographic anatomy of superimposed suture lines were investigated and such suture lines as fronto-zygomatic spheno-zygomatic, spheno-frontal, and spheno-squamosal were found to be the maior suture lines to produce superimposition.Differential diagnosis of the bone destractions by the zygomatic bone was also discussed with biblio-graphical references.
一般社団法人日本耳鼻咽喉科学会の論文