Evidence of previous C7/T1 laminectomy. Previously demonstrated large pseudomeningocele extending posteriorly through the laminectomy defect has increased in size, now measuring approximately 58 x 45 x 60 mm (AP x ML x SI), previously measuring 48 x 40 x 49 mm (AP x ML x SI). The lesion extends through the right epidural space at C7/T1 level with mild flattening and displacement of the cord to the left side. A large thecal defect allows free communication between the subarachnoid space and the pseudomeningocoele. It partially wraps around the right anterior aspect of the cord and extends through the right C7/T1 intervertebral foramen, with bony remodelling and widening of the exit neural foramen, into the paravertebral space and extending along the T1 nerve root. The epidural/foraminal/extraforaminal component has also increased in size since the previous study, now measuring 30 x 16 x 15 mm and previously 22 x 14 x 6 m. Enhancement of the wall of the pseudomeningocele is also more prominent than previously. No new cervical lesion.
Conclusion: Increased size of the C7/T1 pseudomeningocele communicating with the subarachnoid via a large defect. Increased size of the epidural/foraminal/extraforaminal component with Increased enhancement, suggestive of tumour recurrence.