Brown-Séquard Syndrome and Medical Malpractice

What Is Brown-Séquard Syndrome?

Brown-Séquard Syndrome results from hemisection (damage to one side) of the spinal cord — most commonly from penetrating injuries (stabbings, gunshot wounds) but also from compressive lesions (hematomas, abscesses, tumors) that affect one side of the cord more than the other.

The classic presentation of BSS includes:

Ipsilateral (same side as the injury) deficits:

• Loss of motor function (paralysis or weakness): Because the corticospinal tract (motor pathway) crosses in the brainstem — damage below that crossing causes ipsilateral motor loss.
• Loss of proprioception and vibration: Because the dorsal columns (sensory pathways for position sense and vibration) also cross in the brainstem — damage causes ipsilateral sensory loss.
• Loss of fine touch: Also carried in the dorsal columns.

Causes of Brown-Séquard Syndrome

BSS can be caused by:

• Penetrating trauma: Stab wounds, gunshot wounds, or other penetrating injuries to the spine — the classic cause of pure BSS. [Link to: /brain-injury/motor-vehicle-accidents]
• Spinal hematoma: Bleeding in or around the spinal cord — often after surgery, epidural injection, or trauma — that compresses one side of the cord. Requires emergency surgical evacuation. [Link to: /surgical-errors/post-operative-hemorrhage]
• Spinal epidural abscess: A spinal infection compressing one side of the cord — requiring prompt diagnosis and surgical decompression. [Link to: /spinal-cord-injury/spinal-abscess]
• Spinal tumor: Tumors compressing one side of the spinal cord — requiring prompt diagnosis and treatment. [Link to: /misdiagnosis/brain-tumor] [Link to: /delayed-diagnosis-lawyer/spinal-cord-compression]
• Surgical complications: Damage to one side of the spinal cord during spinal surgery — from instruments, hardware, or ischemia. [Link to: /surgical-error-lawyer] [Link to: /surgical-errors/spinal-fusion]
• Spinal cord infarction: Stroke of the spinal cord affecting one side — often from vertebral artery injury or aortic surgery complications. [Link to: /medical-malpractice/stroke-misdiagnosis] [Link to: /surgical-errors/cardiac-surgery-malpractice]
• Radiation injury: Radiation therapy to the spine causing spinal cord damage.
• Demyelinating disease: Multiple sclerosis or other demyelinating conditions can rarely cause BSS-like syndromes.

How Medical Negligence Causes BSS

Medical negligence that causes Brown-Séquard Syndrome typically involves:

• Delayed diagnosis of spinal cord compression: Failure to promptly diagnose spinal cord compression from hematoma, abscess, or tumor — allowing irreversible damage to one side of the cord. [Link to: /delayed-diagnosis-lawyer/spinal-cord-compression]
• Surgical errors: Damage to one side of the spinal cord during surgery — from instruments, improper hardware placement, or failure to recognize intraoperative injury. [Link to: /surgical-error-lawyer] [Link to: /surgical-errors/neurosurgery-malpractice]
• Failure to recognize post-surgical hematoma: Not monitoring for and promptly evacuating post-surgical hematomas that compress the spinal cord. [Link to: /surgical-errors/post-operative-hemorrhage] [Link to: /medical-malpractice/failure-to-monitor]
• Failure to diagnose spinal epidural abscess: Dismissing symptoms of spinal infection (fever, back pain, neurological deficits) — delaying diagnosis and surgical decompression. [Link to: /spinal-cord-injury/spinal-abscess]
• Anesthesia errors: Improper administration of spinal or epidural anesthesia — causing hematoma, direct injury, or ischemia affecting one side of the cord. [Link to: /anesthesia-errors/spinal-epidural] [Link to: /medical-malpractice/anesthesia-error]
• Failure to monitor: In ICUs and post-surgical units — failure to monitor for spinal cord compression, hematoma, or neurological deterioration. [Link to: /medical-malpractice/icu-negligence]
• Aortic surgery complications: Disruption of spinal cord blood supply during aortic surgery — causing spinal cord infarction. [Link to: /surgical-errors/cardiac-surgery-malpractice]

Diagnosis and the Standard of Care

The standard of care for diagnosing Brown-Séquard Syndrome requires:

1. Recognizing the clinical presentation: BSS should be suspected in any patient with asymmetric neurological deficits — particularly ipsilateral motor loss with contralateral sensory loss. Emergency physicians, neurologists, and neurosurgeons must recognize this pattern.

2. Emergency MRI: The gold standard for diagnosing spinal cord injury and identifying the underlying cause (hematoma, abscess, tumor, compression). MRI should be obtained emergently in any patient with signs of spinal cord injury. [Link to: /radiology-errors/mri-malpractice]

3. Neurological evaluation: A thorough neurological examination — including motor strength, sensory testing (light touch, pinprick, temperature, vibration, proprioception), and reflexes — to identify the pattern of deficits.

4. Identifying and treating the underlying cause: Once the cause is identified (hematoma, abscess, tumor, compression) — the standard of care requires prompt treatment — typically emergency surgical decompression.

5. Close monitoring: Monitoring for neurological deterioration — and prompt re-evaluation if new deficits develop. [Link to: /medical-malpractice/failure-to-monitor]

Prognosis and Recovery

Brown-Séquard Syndrome has the best prognosis for recovery among incomplete spinal cord syndromes — with most patients showing significant improvement over time:

- Motor recovery: Most BSS patients recover significant motor function — particularly in the legs. Recovery often begins within weeks and continues for 1-2 years. - Sensory recovery: Sensory deficits often improve — though some permanent sensory loss may remain. - Bowel and bladder function: Often preserved or recovers — because the spinal cord is only hemisected. - Ambulation: Many BSS patients regain the ability to walk — with or without assistive devices.

Despite this relatively favorable prognosis, BSS can still cause significant permanent disability — including residual weakness, sensory deficits, chronic pain, and spasticity. The degree of recovery depends on the severity of the initial injury, the timeliness of treatment, and individual factors.

Why this matters for malpractice: Because BSS has a relatively good prognosis with prompt treatment — delays in diagnosis and treatment can convert a recoverable injury into a permanent one. Expert testimony is required to establish that prompt treatment would have resulted in significantly better outcomes. [Link to: /delayed-diagnosis-lawyer/proving-malpractice]

Proving Causation in BSS Cases

Proving that medical negligence caused or worsened Brown-Séquard Syndrome requires establishing:

1. The standard of care was breached: Expert testimony from a neurosurgeon or neurologist — that the provider failed to promptly diagnose and treat the spinal cord compression, made a surgical error, or failed to monitor for complications.

2. The breach caused or worsened the BSS: Expert testimony linking the delay or error to the severity of the neurological deficits — based on the timeline, imaging studies, and clinical course.

3. Prompt treatment would have resulted in better outcomes: Expert testimony that if the spinal cord compression had been promptly diagnosed and treated, the BSS would have been less severe — or recovery would have been significantly better. This is particularly important in BSS cases — because the syndrome has a relatively good prognosis with prompt treatment.

The defense may argue that the patient's underlying condition was the primary cause, that the outcome was inevitable, or that the recovery was expected regardless of treatment timing. Expert testimony is required to counter these arguments — particularly using the Loss of Chance doctrine. [Link to: /medical-malpractice/loss-of-chance] [Link to: /surgical-errors/error-vs-known-risk]

Damages in Brown-Séquard Cases

Damages in Brown-Séquard syndrome malpractice cases may include:

• Medical expenses: Including emergency surgery, hospitalization, rehabilitation, assistive equipment, and ongoing medical care.
• Lost wages and loss of earning capacity.
• Pain and suffering: Physical pain, emotional distress, loss of independence, and loss of enjoyment of life. New York does not cap non-economic damages.
• Rehabilitation costs: Physical therapy, occupational therapy, and rehabilitation.
• Loss of consortium.
• Wrongful death damages: If the BSS or its complications caused death. [Link to: /wrongful-death-lawyer]

New York Statute of Limitations

Under CPLR § 214-a, the statute of limitations is 2.5 years from the date of the negligent act. The continuous treatment doctrine may extend the deadline if you continued receiving treatment from the same provider for the same condition (common in BSS cases involving prolonged rehabilitation). For wrongful death, the deadline is 2 years from the date of death (EPTL § 5-4.1). For municipal hospital claims (NYC Health + Hospitals), a Notice of Claim must be filed within 90 days. [Link to: /medication-errors/statute-of-limitations] [Link to: /wrongful-death/statute-of-limitations]

Frequently Asked Questions

The value of a medical malpractice case in New York depends on several factors, including the severity of the injury, the strength of liability evidence, and the economic and non-economic damages involved. New York is one of the few states with no caps on medical malpractice damages, meaning there is no artificial limit on what you can recover. Below are typical settlement ranges based on injury severity.