Downward Laminotomy Technique for Hidden Zone Foraminal Disk Herniations: Technical Notes and Preliminary Results

    loading  Checking for direct PDF access through Ovid



Hidden zone foraminal herniations are among the more rare forms of herniations. As exploration is difficult, and there is a close relationship between the nerve root and pedicle, many surgical approaches have been proposed. The aim of this study was to describe downward laminotomy as a new approach to these herniations.

Materials and Methods:

A downward laminotomy technique was used in 5 cases with hidden zone foraminal disk herniation with no extension to the intervertebral disk space.


The herniated disk fragment was located at L4–L5 in 4 cases and at L3–L4 in 1 case. Mean visual analog scale scores reduced from preoperative 8.2 to 2.1 postoperatively. The allodynia was resolved in two months.


It was concluded that downward laminotomy provides a safe, less risky, and minimally invasive approach to hidden zone foraminal disk herniations.

Related Topics

    loading  Loading Related Articles