Hi, I don't know how much I can help. I think we are in the same boat, so I will do my best.

Looks like cervical myelomalacia is it's own thing. Not a lesion. A lesion is a scar or scar tissue from where the spinal cord was attacked. Same with other lesions that can occur in the brain.
"Minimally invasive back stabilization may be a treatment option for some patients who are experiencing pain from degenerative spine conditions like cervical myelomalacia (the softening of the spinal cord in the upper spine). This condition can occur when there is insufficient blood supply to the spinal cord."
Cervical Myelomalacia can get worse over time without treatment. You would probably want to schedule a follow up with your dr or neurologist and find out what the next step is, tests or concerns you may have and what treatment would be best.