What is the differential?
The usual suspects are involved: astrocytoma, ganglioglioma and a metastasis should all be considered. A spinal cord abscess / infection can be included on the differential.
Why is an ependymoma unlikely to be the diagnosis?
An ependymoma is unlikely given the very eccentric location.
A heterogeneous vividly enhancing nodule ( * ) is associated with extensive cord oedema above and below it (green arrows). The nodule appears intramedullary with a visible 'claw sign' - cord (C) is seen wrapping around it (yellow arrows), rather than being pushed away (red arrows) as would be expected in an extramedullary mass.