Sequestered disc herniation means that the jelly (nucleus) has pushed through the PLL and is a free fragment in the canal, no longer connected to the disc it came from.
About the Author: Donald Corenman, MD, DC
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.