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Tractotomy: Surgical Technique, Indications, and Modern Alternatives

Tractotomy (tractotomy, cordotomy) is a neurosurgical procedure that interrupts specific ascending or descending fiber tracts in the spinal cord or brainstem to treat intractable pain, spasticity, or movement disorders. It is a lesional (ablative) procedure, now largely supplanted by neuromodulation but still used in select cases.

Types

TypeApproachTargetIndications
Open Tractotomy (Anterolateral Cordotomy)Laminectomy / laminotomy (cervical or thoracic)Spinothalamic tract (pain/temperature) — usually C1–C2 or T1–T2Unilateral cancer pain below lesion level; refractory to opioids/neuromodulation
Percutaneous CT-Guided CordotomyPercutaneous needle electrode at C1–C2 under CT fluoroscopyLateral spinothalamic tractSame as open; less invasive; radiofrequency thermocoagulation
Stereotactic TractotomyFrame-based or frameless stereotaxySpecific brainstem/spinal tracts (e.g., medial lemniscus, pyramidal tract for spasticity)Spasticity, dystonia, tremor (historical); now DBS preferred
Commissural MyelotomyMidline myelotomyAnterior white commissure (bilateral visceral pain)Bilateral pelvic/visceral cancer pain

Mechanism

Interrupts nociceptive transmission (spinothalamic) or spasticity pathways (pyramidal, reticulospinal) by creating a controlled lesion. Effect is contralateral for spinothalamic (decussates 1–2 levels up).

Risks & Complications

  • Transient / permanent motor weakness (corticospinal tract proximity)
  • Urinary/bowel dysfunction (autonomic fibers)
  • Dysesthesia / deafferentation pain (paradoxical)
  • CSF leak, infection, hemorrhage
  • Respiratory compromise (high cervical)

Modern Alternatives (Preferred First-Line)

  • Spinal Cord Stimulation (SCS): Reversible, adjustable, non-destructive.
  • Intrathecal Drug Delivery (ITDD): Baclofen (spasticity), opioids/ziconotide (pain).
  • Deep Brain Stimulation (DBS): VIM/GPi/STN for tremor/dystonia; PAG/PVG for pain.
  • MR-guided Focused Ultrasound (FUS): Non-invasive thalamotomy / pallidotomy.

Current Role

Tractotomy is reserved for end-of-life cancer pain (unilateral, short life expectancy) or resource-limited settings where neuromodulation is unavailable. Multidisciplinary pain/neurosurgery evaluation is mandatory.

Lesional neurosurgery remains a tool—but neuromodulation has shifted the paradigm from destruction to modulation.

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