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Lipoma in CPA-IAC
H. Ric Harnsberger, MD
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KEY FACTS

  • Terminology

    • Imaging

      • Top Differential Diagnoses

        • Pathology

          • Clinical Issues

            TERMINOLOGY

            • Synonyms

              • Congenital lipoma, lipomatous hamartoma
            • Definitions

              • Lipoma in cerebellopontine angle (CPA)-internal auditory canal (IAC): Nonneoplastic mass of adipose tissue in CPA-IAC area
                • Congenital malformation; not true neoplasm

            IMAGING

            • General Features

              • CT Findings

                • MR Findings

                  • Imaging Recommendations

                    DIFFERENTIAL DIAGNOSIS

                      PATHOLOGY

                      • General Features

                        • Gross Pathologic & Surgical Features

                          • Microscopic Features

                            CLINICAL ISSUES

                            • Presentation

                              • Demographics

                                • Natural History & Prognosis

                                  • Treatment

                                    DIAGNOSTIC CHECKLIST

                                    • Consider

                                      • Image Interpretation Pearls

                                        • Reporting Tips

                                          Selected References

                                          1. Bacciu A et al: Lipomas of the internal auditory canal and cerebellopontine angle. Ann Otol Rhinol Laryngol. 123(1):58-64, 2014
                                          2. White JR et al: Lipomas of the cerebellopontine angle and internal auditory canal: Primum Non Nocere. Laryngoscope. 123(6):1531-6, 2013
                                          3. Mukherjee P et al: Intracranial lipomas affecting the cerebellopontine angle and internal auditory canal: a case series. Otol Neurotol. 32(4):670-5, 2011
                                          4. Vernooij MW et al: Intravestibular lipoma: an important imaging diagnosis. Arch Otolaryngol Head Neck Surg. 134(11):1225-8, 2008
                                          5. Sade B et al: Cerebellopontine angle lipoma presenting with hemifacial spasm: case report and review of the literature. J Otolaryngol. 34(4):270-3, 2005
                                          6. Gaskin CM et al: Lipomas, lipoma variants, and well-differentiated liposarcomas (atypical lipomas): results of MRI evaluations of 126 consecutive fatty masses. AJR Am J Roentgenol. 182(3):733-9, 2004
                                          7. Dahlen RT et al: CT and MR imaging characteristics of intravestibular lipoma. AJNR Am J Neuroradiol. 23(8):1413-7, 2002
                                          8. Tankéré F et al: Cerebellopontine angle lipomas: report of four cases and review of the literature. Neurosurgery. 50(3):626-31; discussion 631-2, 2002
                                          9. Singh SP et al: Lipomas of the internal auditory canal. Arch Pathol Lab Med. 120(7):681-3, 1996
                                          10. Kato T et al: Trigeminal neuralgia caused by a cerebellopontine-angle lipoma: case report. Surg Neurol. 44(1):33-5, 1995
                                          11. Truwit CL et al: Pathogenesis of intracranial lipoma: an MR study in 42 patients. AJR Am J Roentgenol. 155(4):855-64; discussion 865, 1990
                                          12. Maiuri F et al: Intracranial lipomas. Diagnostic and therapeutic considerations. J Neurosurg Sci. 32(4):161-7, 1988
                                          13. Rosenbloom SB et al: Cerebellopontine angle lipoma. Surg Neurol. 23(2):134-8, 1985
                                          14. Leibrock LG et al: Cerebellopontine angle lipoma: a review. Neurosurgery. 12(6):697-9, 1983
                                          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

                                                    • Synonyms

                                                      • Congenital lipoma, lipomatous hamartoma
                                                    • Definitions

                                                      • Lipoma in cerebellopontine angle (CPA)-internal auditory canal (IAC): Nonneoplastic mass of adipose tissue in CPA-IAC area
                                                        • Congenital malformation; not true neoplasm

                                                    IMAGING

                                                    • General Features

                                                      • CT Findings

                                                        • MR Findings

                                                          • Imaging Recommendations

                                                            DIFFERENTIAL DIAGNOSIS

                                                              PATHOLOGY

                                                              • General Features

                                                                • Gross Pathologic & Surgical Features

                                                                  • Microscopic Features

                                                                    CLINICAL ISSUES

                                                                    • Presentation

                                                                      • Demographics

                                                                        • Natural History & Prognosis

                                                                          • Treatment

                                                                            DIAGNOSTIC CHECKLIST

                                                                            • Consider

                                                                              • Image Interpretation Pearls

                                                                                • Reporting Tips

                                                                                  Selected References

                                                                                  1. Bacciu A et al: Lipomas of the internal auditory canal and cerebellopontine angle. Ann Otol Rhinol Laryngol. 123(1):58-64, 2014
                                                                                  2. White JR et al: Lipomas of the cerebellopontine angle and internal auditory canal: Primum Non Nocere. Laryngoscope. 123(6):1531-6, 2013
                                                                                  3. Mukherjee P et al: Intracranial lipomas affecting the cerebellopontine angle and internal auditory canal: a case series. Otol Neurotol. 32(4):670-5, 2011
                                                                                  4. Vernooij MW et al: Intravestibular lipoma: an important imaging diagnosis. Arch Otolaryngol Head Neck Surg. 134(11):1225-8, 2008
                                                                                  5. Sade B et al: Cerebellopontine angle lipoma presenting with hemifacial spasm: case report and review of the literature. J Otolaryngol. 34(4):270-3, 2005
                                                                                  6. Gaskin CM et al: Lipomas, lipoma variants, and well-differentiated liposarcomas (atypical lipomas): results of MRI evaluations of 126 consecutive fatty masses. AJR Am J Roentgenol. 182(3):733-9, 2004
                                                                                  7. Dahlen RT et al: CT and MR imaging characteristics of intravestibular lipoma. AJNR Am J Neuroradiol. 23(8):1413-7, 2002
                                                                                  8. Tankéré F et al: Cerebellopontine angle lipomas: report of four cases and review of the literature. Neurosurgery. 50(3):626-31; discussion 631-2, 2002
                                                                                  9. Singh SP et al: Lipomas of the internal auditory canal. Arch Pathol Lab Med. 120(7):681-3, 1996
                                                                                  10. Kato T et al: Trigeminal neuralgia caused by a cerebellopontine-angle lipoma: case report. Surg Neurol. 44(1):33-5, 1995
                                                                                  11. Truwit CL et al: Pathogenesis of intracranial lipoma: an MR study in 42 patients. AJR Am J Roentgenol. 155(4):855-64; discussion 865, 1990
                                                                                  12. Maiuri F et al: Intracranial lipomas. Diagnostic and therapeutic considerations. J Neurosurg Sci. 32(4):161-7, 1988
                                                                                  13. Rosenbloom SB et al: Cerebellopontine angle lipoma. Surg Neurol. 23(2):134-8, 1985
                                                                                  14. Leibrock LG et al: Cerebellopontine angle lipoma: a review. Neurosurgery. 12(6):697-9, 1983