Lumbar intraradicular disc herniation: report of a rare and preoperatively unpredictable case and review of the literature.

Background Context: Intraradicular lumbar disc herniation is rare, having been reported to date in only three postoperative patients. The diagnosis is typically made intraoperatively.

Purpose: To report a fourth case of intraradicular disc herniation, to emphasize its radiological characteristics and operative findings.

Study Design: Case report.

Patient Sample: A 41-year-old female.

Methods: Retrospective case review.

Results: The patient underwent a second operation and intraradicular disc fragment was removed. She was completely well at her 9-month check up.

Conclusions: The diagnosis, mechanism, and surgical treatment of intraradicular lumbar disc herniation are reviewed. The round shape of the sequestrated fragment, as seen on magnetic resonance imaging, may help to establish the correct diagnosis.