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CPA-IAC
H. Ric Harnsberger, MD; Surjith Vattoth, MD, FRCR
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TERMINOLOGY

  • Abbreviations

    • Cerebellopontine angle (CPA) & internal auditory canal (IAC)
    • Superior vestibular nerve (SVN) & inferior vestibular nerve (IVN)
    • Anterior inferior cerebellar artery (AICA)
  • Definitions

    • CPA-IAC cistern: Cerebrospinal fluid (CSF) space in CPA & IAC containing CNVII & CNVIII & AICA loop
    • IAC fundus: Lateral CSF-filled cap of IAC cistern containing distal CNVII, SVN, IVN, & cochlear nerve
    • Cochlear nerve canal: Bony opening connecting IAC fundus to cochlea
    • Porus acusticus: Large opening at medial aspect of IAC connecting it to CPA cistern

IMAGING ANATOMY

  • Internal Contents

    ANATOMY IMAGING ISSUES

    • Questions

      • Imaging Approaches

        • Imaging Pitfalls

          CLINICAL IMPLICATIONS

          • Function & Dysfunction

            Related Anatomy
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            Related Differential Diagnoses
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            References
            Tables

            Tables

            TERMINOLOGY

            • Abbreviations

              • Cerebellopontine angle (CPA) & internal auditory canal (IAC)
              • Superior vestibular nerve (SVN) & inferior vestibular nerve (IVN)
              • Anterior inferior cerebellar artery (AICA)
            • Definitions

              • CPA-IAC cistern: Cerebrospinal fluid (CSF) space in CPA & IAC containing CNVII & CNVIII & AICA loop
              • IAC fundus: Lateral CSF-filled cap of IAC cistern containing distal CNVII, SVN, IVN, & cochlear nerve
              • Cochlear nerve canal: Bony opening connecting IAC fundus to cochlea
              • Porus acusticus: Large opening at medial aspect of IAC connecting it to CPA cistern

            IMAGING ANATOMY

            • Internal Contents

              ANATOMY IMAGING ISSUES

              • Questions

                • Imaging Approaches

                  • Imaging Pitfalls

                    CLINICAL IMPLICATIONS

                    • Function & Dysfunction