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Filum Terminale Fibrolipoma
Kevin R. Moore, MD
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KEY FACTS

  • Terminology

    • Imaging

      • Top Differential Diagnoses

        • Pathology

          • Clinical Issues

            • Diagnostic Checklist

              TERMINOLOGY

              • Synonyms

                • Fibrolipoma of filum terminale, fatty filum terminale, "fat in filum"
              • Definitions

                • Asymptomatic presence of fat within otherwise normal-appearing filum terminale
                • Conus terminates at normal level without imaging stigmata of tethered spinal cord

              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

                                        Selected References

                                        1. Harada A et al: Intraspinal lesions associated with sacrococcygeal dimples. J Neurosurg Pediatr. 14(1):81-6, 2014
                                        2. Thompson EM et al: Clinical significance of imaging and histological characteristics of filum terminale in tethered cord syndrome. J Neurosurg Pediatr. 13(3):255-9, 2014
                                        3. Izci Y et al: Fatty filum with different histological features. Case report. Neurocirugia (Astur). 22(5):457-60, 2011
                                        4. Bui CJ et al: Tethered cord syndrome in children: a review. Neurosurg Focus. 23(2):1-9, 2007
                                        5. Kesler H et al: Termination of the normal conus medullaris in children: a whole-spine magnetic resonance imaging study. Neurosurg Focus. 23(2):1-5, 2007
                                        6. Bulsara KR et al: The value of magnetic resonance imaging in the evaluation of fatty filum terminale. Neurosurgery. 54(2):375-9; discussion 379-80, 2004
                                        7. Bulsara KR et al: Clinical outcome differences for lipomyelomeningoceles, intraspinal lipomas, and lipomas of the filum terminale. Neurosurg Rev. 24(4): 192-4, 2001
                                        8. Kujas M et al: Intradural spinal lipoma of the conus medullaris without spinal dysraphism. Clin Neuropathol. 19(1): 30-3, 2000
                                        9. Xenos C et al: Spinal lipomas in children. Pediatr Neurosurg. 32(6): 295-307, 2000
                                        10. La Marca F et al: Spinal lipomas in children: outcome of 270 procedures. Pediatr Neurosurg. 26(1): 8-16, 1997
                                        11. Rypens F et al: Atypical and equivocal sonographic features of the spinal cord in neonates. Pediatr Radiol. 25(6):429-32, 1995
                                        12. Brown E et al: Prevalence of incidental intraspinal lipoma of the lumbosacral spine as determined by MRI. Spine. 19(7): 833-6, 1994
                                        13. Okumura R et al: Fatty filum terminale: assessment with MR imaging. J Comput Assist Tomogr. 14(4): 571-3, 1990
                                        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

                                                    • Synonyms

                                                      • Fibrolipoma of filum terminale, fatty filum terminale, "fat in filum"
                                                    • Definitions

                                                      • Asymptomatic presence of fat within otherwise normal-appearing filum terminale
                                                      • Conus terminates at normal level without imaging stigmata of tethered spinal cord

                                                    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

                                                                              Selected References

                                                                              1. Harada A et al: Intraspinal lesions associated with sacrococcygeal dimples. J Neurosurg Pediatr. 14(1):81-6, 2014
                                                                              2. Thompson EM et al: Clinical significance of imaging and histological characteristics of filum terminale in tethered cord syndrome. J Neurosurg Pediatr. 13(3):255-9, 2014
                                                                              3. Izci Y et al: Fatty filum with different histological features. Case report. Neurocirugia (Astur). 22(5):457-60, 2011
                                                                              4. Bui CJ et al: Tethered cord syndrome in children: a review. Neurosurg Focus. 23(2):1-9, 2007
                                                                              5. Kesler H et al: Termination of the normal conus medullaris in children: a whole-spine magnetic resonance imaging study. Neurosurg Focus. 23(2):1-5, 2007
                                                                              6. Bulsara KR et al: The value of magnetic resonance imaging in the evaluation of fatty filum terminale. Neurosurgery. 54(2):375-9; discussion 379-80, 2004
                                                                              7. Bulsara KR et al: Clinical outcome differences for lipomyelomeningoceles, intraspinal lipomas, and lipomas of the filum terminale. Neurosurg Rev. 24(4): 192-4, 2001
                                                                              8. Kujas M et al: Intradural spinal lipoma of the conus medullaris without spinal dysraphism. Clin Neuropathol. 19(1): 30-3, 2000
                                                                              9. Xenos C et al: Spinal lipomas in children. Pediatr Neurosurg. 32(6): 295-307, 2000
                                                                              10. La Marca F et al: Spinal lipomas in children: outcome of 270 procedures. Pediatr Neurosurg. 26(1): 8-16, 1997
                                                                              11. Rypens F et al: Atypical and equivocal sonographic features of the spinal cord in neonates. Pediatr Radiol. 25(6):429-32, 1995
                                                                              12. Brown E et al: Prevalence of incidental intraspinal lipoma of the lumbosacral spine as determined by MRI. Spine. 19(7): 833-6, 1994
                                                                              13. Okumura R et al: Fatty filum terminale: assessment with MR imaging. J Comput Assist Tomogr. 14(4): 571-3, 1990