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Petrous Apex Asymmetric Marrow
Bronwyn E. Hamilton, MD; H. Ric Harnsberger, MD
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KEY FACTS

  • Terminology

    • Imaging

      • Top Differential Diagnoses

        • Pathology

          • Clinical Issues

            TERMINOLOGY

            • Abbreviations

              • Petrous apex (PA)
            • Synonyms

              • PA pseudolesion
            • Definitions

              • PA asymmetric marrow: Asymmetric pneumatization of PA with nonpneumatized marrow space in opposite PA simulating mass lesion

            IMAGING

            • General Features

              • CT Findings

                • MR Findings

                  • Imaging Recommendations

                    DIFFERENTIAL DIAGNOSIS

                      PATHOLOGY

                      • General Features

                        CLINICAL ISSUES

                        • Presentation

                          • Demographics

                            • Natural History & Prognosis

                              • Treatment

                                DIAGNOSTIC CHECKLIST

                                • Consider

                                  Selected References

                                  1. Bekci T et al: Quantitative three-dimensional computed tomography analysis of sinus tympani volume in temporal bones with petrous apex pneumatization. Auris Nasus Larynx. 47(4):587-92., 2020
                                  2. Campion T et al: Imaging of temporal bone inflammations in children: a pictorial review. Neuroradiology. 61(9):959-70, 2019
                                  3. Dexian Tan A et al: Classification of temporal bone pneumatization on high-resolution computed tomography: prevalence patterns and implications. Otolaryngol Head Neck Surg. 159(4):743-9, 2018
                                  4. Kunimatsu A et al: Skull base tumors and tumor-like lesions: A pictorial review. Pol J Radiol. 82:398-409, 2017
                                  5. Malone A et al: Pneumatization patterns of the petrous apex and lateral sphenoid recess. J Neurol Surg B Skull Base. 78(6):441-6, 2017
                                  6. Lee DH et al: Anatomical factors influencing pneumatization of the petrous apex. Clin Exp Otorhinolaryngol. 8(4):339-44, 2015
                                  7. Bag AK et al: Neuroimaging: intrinsic lesions of the central skull base region. Semin Ultrasound CT MR. 34(5):412-35, 2013
                                  8. Wu H et al: Coexistence of a pseudolesion and a true lesion in the same location: a rare misleading imaging finding. Am J Otolaryngol. 33(2):266-7, 2012
                                  9. Schmalfuss IM: Petrous apex. Neuroimaging Clin N Am. 19(3):367-91, 2009
                                  10. Connor SE et al: Imaging of the petrous apex: a pictorial review. Br J Radiol. 81(965):427-35, 2008
                                  11. Leonetti JP et al: Incidental petrous apex findings on magnetic resonance imaging. Ear Nose Throat J. 80(4):200-2, 205-6, 2001
                                  12. Moore KR et al: 'Leave me alone' lesions of the petrous apex. AJNR Am J Neuroradiol. 19(4):733-8, 1998
                                  13. Virapongse C et al: Computed tomography of temporal bone pneumatization: 1. Normal pattern and morphology. AJR Am J Roentgenol. 145(3):473-81, 1985
                                  Related Anatomy
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                                  Related Differential Diagnoses
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                                  References
                                  Tables

                                  Tables

                                  KEY FACTS

                                  • Terminology

                                    • Imaging

                                      • Top Differential Diagnoses

                                        • Pathology

                                          • Clinical Issues

                                            TERMINOLOGY

                                            • Abbreviations

                                              • Petrous apex (PA)
                                            • Synonyms

                                              • PA pseudolesion
                                            • Definitions

                                              • PA asymmetric marrow: Asymmetric pneumatization of PA with nonpneumatized marrow space in opposite PA simulating mass lesion

                                            IMAGING

                                            • General Features

                                              • CT Findings

                                                • MR Findings

                                                  • Imaging Recommendations

                                                    DIFFERENTIAL DIAGNOSIS

                                                      PATHOLOGY

                                                      • General Features

                                                        CLINICAL ISSUES

                                                        • Presentation

                                                          • Demographics

                                                            • Natural History & Prognosis

                                                              • Treatment

                                                                DIAGNOSTIC CHECKLIST

                                                                • Consider

                                                                  Selected References

                                                                  1. Bekci T et al: Quantitative three-dimensional computed tomography analysis of sinus tympani volume in temporal bones with petrous apex pneumatization. Auris Nasus Larynx. 47(4):587-92., 2020
                                                                  2. Campion T et al: Imaging of temporal bone inflammations in children: a pictorial review. Neuroradiology. 61(9):959-70, 2019
                                                                  3. Dexian Tan A et al: Classification of temporal bone pneumatization on high-resolution computed tomography: prevalence patterns and implications. Otolaryngol Head Neck Surg. 159(4):743-9, 2018
                                                                  4. Kunimatsu A et al: Skull base tumors and tumor-like lesions: A pictorial review. Pol J Radiol. 82:398-409, 2017
                                                                  5. Malone A et al: Pneumatization patterns of the petrous apex and lateral sphenoid recess. J Neurol Surg B Skull Base. 78(6):441-6, 2017
                                                                  6. Lee DH et al: Anatomical factors influencing pneumatization of the petrous apex. Clin Exp Otorhinolaryngol. 8(4):339-44, 2015
                                                                  7. Bag AK et al: Neuroimaging: intrinsic lesions of the central skull base region. Semin Ultrasound CT MR. 34(5):412-35, 2013
                                                                  8. Wu H et al: Coexistence of a pseudolesion and a true lesion in the same location: a rare misleading imaging finding. Am J Otolaryngol. 33(2):266-7, 2012
                                                                  9. Schmalfuss IM: Petrous apex. Neuroimaging Clin N Am. 19(3):367-91, 2009
                                                                  10. Connor SE et al: Imaging of the petrous apex: a pictorial review. Br J Radiol. 81(965):427-35, 2008
                                                                  11. Leonetti JP et al: Incidental petrous apex findings on magnetic resonance imaging. Ear Nose Throat J. 80(4):200-2, 205-6, 2001
                                                                  12. Moore KR et al: 'Leave me alone' lesions of the petrous apex. AJNR Am J Neuroradiol. 19(4):733-8, 1998
                                                                  13. Virapongse C et al: Computed tomography of temporal bone pneumatization: 1. Normal pattern and morphology. AJR Am J Roentgenol. 145(3):473-81, 1985