Dorsal Root Entry Zone Interventions for Chronic Pain Management
Summary
Dorsal Root Entry Zone (DREZ) interventions encompass surgical and neuromodulatory techniques aimed at disrupting pathological pain signalling at the interface where primary sensory fibres enter the spinal cord. Originally developed for central neuropathic pain arising from spinal cord and root avulsion injuries, DREZ lesioning—or DREZotomy—has evolved with the introduction of refined lesioning probes, intraoperative electrophysiological monitoring and advanced imaging guidance. These developments have enhanced precision in targeting hyperexcitable neuronal clusters that generate spontaneous ectopic discharges. Patient selection is guided by the distribution and character of pain, with deafferentation syndromes such as brachial plexus avulsion and post-spinal cord injury pain most amenable to this approach. Outcomes studies report substantial long-term relief in a majority of carefully selected cases, although the risk of proprioceptive or motor deficits remains a consideration. Contemporary research has also explored less invasive neuromodulation adjuncts to DREZ lesioning and has begun mapping molecular markers of maladaptive plasticity within the dorsal horn. Globally, DREZ interventions represent an important option for refractory chronic neuropathic pain, offering durable benefit where pharmacological and conventional neuromodulatory therapies prove insufficient.
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Dorsal Root Entry Zone Interventions for Chronic Pain Management publication trend
The graph below shows the total number of articles in dorsal root entry zone interventions for chronic pain management across all publications each year (not limited to Nature Index journals).
Technical terms
Technical term: Dorsal Root Entry Zone (DREZ) – the anatomical region where primary sensory afferent fibres synapse in the dorsal horn of the spinal cord.
Technical term: DREZ lesioning (DREZotomy) – a neurosurgical procedure that creates controlled lesions within the dorsal root entry zone to disrupt aberrant nociceptive signalling.
Technical term: Neuropathic pain – chronic pain arising from injury or dysfunction in the peripheral or central nervous system, characterised by burning, shooting or electric-shock sensations.
Technical term: Brachial plexus avulsion – traumatic detachment of spinal nerve roots from the spinal cord, often resulting in deafferentation pain refractory to conservative treatments.
References
- Experience with 25 years of dorsal root entry zone lesioning at a single institution. Surgical Neurology International (2013).
- Dorsal Root Entry Zone Lesioning for Brachial Plexus Avulsion Injuries: Case Series and Literature Review. Frontiers in Pain Research (2021).
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