Intradural/Extramedullary Lesion, No Enhancement



Intradural/Extramedullary Lesion, No Enhancement


Kevin R. Moore, MD



DIFFERENTIAL DIAGNOSIS


Common



  • Filum Terminale Fibrolipoma


  • CSF Flow Artifact


  • Arachnoid Cyst


Less Common



  • Subarachnoid Hemorrhage


  • Conjoined Nerve Roots


  • Dermoid and Epidermoid Tumors


  • Epidermoid Tumor, Acquired


  • Meningioma (Calcified)


Rare but Important



  • Neurenteric Cyst


  • Arachnoiditis, Lumbar


  • CIDP


  • Hypertrophic Neuropathy


ESSENTIAL INFORMATION


Key Differential Diagnosis Issues



  • Clinical correlation permits more specific diagnosis


Helpful Clues for Common Diagnoses



  • Filum Terminale Fibrolipoma



    • Linear fat signal in filum terminale, normal conus position


  • CSF Flow Artifact



    • T1 hyperintense, T2 hypointense compared to CSF


    • Cannot confirm in exactly same place on orthogonal imaging planes


  • Arachnoid Cyst



    • CSF signal on T1WI, > CSF signal on T2WI


Helpful Clues for Less Common Diagnoses

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Aug 7, 2016 | Posted by in NEUROLOGY | Comments Off on Intradural/Extramedullary Lesion, No Enhancement

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