There is prominent central cord T2 weighted hyperintensity extending from the T1 level to the conus, situated at T12-L1. This is thought to represent cord oedema rather than a syrinx.
At T9 level, there is a well-circumscribed lesion in the left/posterior thecal sac adjacent to the cord, extending as far as the dura. The thecal sac appears mildly expanded posteriorly and effaced anteriorly on sagittal imaging. Location is favored to be intradural extramedullary.
The lesion is T1 weighted hyperintense and avidly enhances. It measures 12 mm transverse, 9 mm AP, and 16 mm craniocaudal diameter.
In retrospect, it can be identified on the previous chest CT as an ill-defined area of enhancement. No adjacent bony remodelling. No other abnormal enhancing lesion is present. No flow voids, adjacent abnormal vessels, or cord expansion were seen to suggest a dural arteriovenous fistula (AVF).