A well defined intradural ovoid lesion is centred within the distal lumbosacral canal. Lesion fills the canal space from the L5-S2 levels. The lesion is confined to the canal without extension into the adjacent exit foramen. It is difficult to determine if the mass arises from a specific nerve root. The lesion has heterogeneous signal characteristics, predominately low signal on T2 weighted images and isointense to CSF on T1 weighted images. On STIR weighted imaging the lesion is predominantly of moderate signal intensity with areas of low signal within which may represent blood products.
Unfortunately, contrast has not been given. No evidence of leptomeningeal deposition elsewhere within the thoracic or lumbar spine however non-contrast imaging is less sensitive for detection of this.