You sound like you have foraminal stenosis or possibly lateral recess stenosis at L5-S1. A cut and paste copy of your radiological MRI and X-ray reports would be helpful. Since you had foot drop and this is the L5-S1 level, you must have foraminal stenosis as foot drop originates from the L5 root most of the time and this root exits out the foramen at L5-S1.
See https://neckandback.com/conditions/lumbar-foraminal-stenosis-collapse/
Yes, it is surgically fixable but without x-Rays or MRI findings, I cannot tell you what procedure would give you the fix that you need.
Dr. Corenman
PLEASE REMEMBER, THIS FORUM IS MEANT TO PROVIDE GENERAL INFORMATION ON SPINE ANATOMY, CONDITIONS AND TREATMENTS. TO GET AN ACCURATE DIAGNOSIS, YOU MUST VISIT A QUALIFIED PROFESSIONAL IN PERSON.
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.