Asymmetric pneumatization of the petrous apex.

Abstract

Three patients with high-intensity MR signals from one petrous apex, but nonpathologic fine-cut computed tomography are reported. In two of the three patients, normal bone marrow within the petrous apex on one side is believed to have generated the high-intensity signal. In one of the three patients, the etiology of the MR image remains obscure, but may represent the earliest stages of petrous cholesterol granuloma or mucocele. We have reviewed 500 head CT scans performed for non-otologic reasons, in an attempt to establish the frequency of this finding. The literature on MR and CT imaging of the petrous apex and asymmetric pneumatization of the petrous apex is reviewed.

• Authors: P S Roland, W L Meyerhoff, L O Judge, B E Mickey
• Journal: Otolaryngology--head and neck surgery : official journal of American Academy of Otolaryngology-Head and Neck Surgery (Otolaryngol Head Neck Surg) Vol. 103 Issue 1 Pg. 80-8 (Jul 1990) ISSN: 0194-5998 [Print] England
• PMID: 2117735 (Publication Type: Journal Article, Review)

Topics

• Adult
• Air
• Female
• Humans
• Magnetic Resonance Imaging
• Male
• Petrous Bone (diagnostic imaging, pathology)
• Tomography, X-Ray Computed