A “bruise” on a spinal cord is really an injury to the tracts of the cord. The signal change (white spot on the T2 MRI images) is swelling into the substance of the cord. The surgery is designed to prevent further injury. It is up to mother nature to allow healing of that injury site. Healing- if it occurs, can take 6-12 months.
I agree that the steroids might have given you some temporary symptom relief. These steroids are critical to prevent any irritation that can be caused by surgery.
I always tell patients with myelopathy that surgery is designed to prevent further progression of the disease but any symptom improvement is a bonus that should not be expected.
Donald Corenman, MD, DC is a highly-regarded spine surgeon, considered an expert in the area of neck and back pain. Trained as both a Medical Doctor and Doctor of Chiropractic, Dr. Corenman earned academic appointments as Clinical Assistant Professor and Assistant Professor of Orthopaedic Surgery at the University of Colorado Health Sciences Center, and his research on spine surgery and rehabilitation has resulted in the publication of multiple peer-reviewed articles and two books.