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Free Content Regressed Pneumatization: Fatty Replacement of Previously Aerated Air Cells Mimicking Arrested Pneumatization

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Arrested pneumatization is characterized by the failure of pneumatization during development, which results in persistent fatty marrow within the air cells. Arrested pneumatization is a normal variant, which should not be mistaken for pathology; however, perhaps not all cases are developmental. We present a case of acquired fatty replacement of a previously pneumatized petrous bone, which is neither developmental nor pathologic. To our knowledge, this has not been described previously in the scientific literature.
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Document Type: Research Article

Publication date: April 1, 2020

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  • Neurographics is the peer-reviewed, bimonthly educational journal of the American Society of Neuroradiology. The journal comprises articles selected from material presented at the ASNR Annual Meeting. Neurographics also publishes other high-quality submissions that are primarily educational and have a high emphasis on a pictorial approach. Neurographics offers CME credit for reading review articles and completing quiz-based self-assessment activities.

    Visit the ASNR Education Connection to view all available CME courses.

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