The thecal sac contains the spinal cord and the CSF (cerebrospinal fluid). The CSF is the “packing” of the canal and is designed to cradle the cord to prevent compression. The fact that there is complete effacement of the ventral thecal sac may not be a big problem if there is CSF behind the cord-the dorsal thecal sac (meaning there is not complete effacement of the thecal sac but only anterior-a big difference).
However a “mild to moderate indentation in the ventral aspect of the spinal cord” is a different story. This is a deformity of the cord from compression. Cord compression can eventually cause cord malfunction-either gradual (myelopathy) or acute (central cord syndrome).
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.
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.