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Head and Neck
Diagnosis
Temporal Bone
Middle Ear-Mastoid
Congenital Lesions
Lateralized Internal Carotid Artery
Lateralized Internal Carotid Artery
Aparna Singhal, MD; Troy A. Hutchins, MD
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KEY FACTS

  • Terminology

    • Imaging

      • Top Differential Diagnoses

        • Pathology

          • Clinical Issues

            • Diagnostic Checklist

              TERMINOLOGY

              • Abbreviations

                • Lateralized internal carotid artery (Lat-ICA)

              • Definitions

                • Anomalous intratemporal course of ICA
                  • Enters anterior mesotympanum
                  • Often has dehiscent lateral ICA bony wall

              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

                                    • Image Interpretation Pearls

                                      Selected References

                                      1. Glastonbury CM et al: Lateralized petrous internal carotid artery: imaging features and distinction from the aberrant internal carotid artery. Neuroradiology. 54(9):1007-13, 2012
                                      2. Pak MW et al: Lateralized carotid artery: an unusual cause of pulsatile tinnitus. Ear Nose Throat J. 80(3):148-9, 2001
                                      3. Saada AA et al: Imaging quiz case 1. Ectopic internal carotid artery (ICA) within the petrous temporal bone. Arch Otolaryngol Head Neck Surg. 122(7):792, 794, 1996
                                      4. Sinnreich AI et al: Arterial malformations of the middle ear. Otolaryngol Head Neck Surg. 92(2):194-206, 1984
                                      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

                                                • Diagnostic Checklist

                                                  TERMINOLOGY

                                                  • Abbreviations

                                                    • Lateralized internal carotid artery (Lat-ICA)

                                                  • Definitions

                                                    • Anomalous intratemporal course of ICA
                                                      • Enters anterior mesotympanum
                                                      • Often has dehiscent lateral ICA bony wall

                                                  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

                                                                        • Image Interpretation Pearls

                                                                          Selected References

                                                                          1. Glastonbury CM et al: Lateralized petrous internal carotid artery: imaging features and distinction from the aberrant internal carotid artery. Neuroradiology. 54(9):1007-13, 2012
                                                                          2. Pak MW et al: Lateralized carotid artery: an unusual cause of pulsatile tinnitus. Ear Nose Throat J. 80(3):148-9, 2001
                                                                          3. Saada AA et al: Imaging quiz case 1. Ectopic internal carotid artery (ICA) within the petrous temporal bone. Arch Otolaryngol Head Neck Surg. 122(7):792, 794, 1996
                                                                          4. Sinnreich AI et al: Arterial malformations of the middle ear. Otolaryngol Head Neck Surg. 92(2):194-206, 1984