Given a posterior central disc extrusion at T6‑T7 measuring 2.5 mm with cranial and caudal migration and a 4 mm posterior central annular fissure (high‑intensity zone) indenting the ventral thoracic cord causing moderate canal stenosis (≈8 mm anteroposterior) with patent neural foramina, should I undergo surgery?

Surgery Decision for T6-T7 Thoracic Disc Extrusion with Cord Compression

Whether you need surgery depends critically on your clinical symptoms—specifically whether you have myelopathy (spasticity, hyperreflexia, positive Babinski sign, bladder dysfunction, motor/sensory deficits) or severe intractable pain that has failed conservative management. 1

Key Decision Framework

Surgical Indications (When Surgery IS Needed)

According to the most recent ACR guidelines, surgery for thoracic disc herniation is indicated for:

• Severe, intractable pain unresponsive to conservative treatment
• Progressive myelopathy (worsening neurological function)
• Severe myelopathy at presentation 1

Your imaging shows concerning features:

• Ventral cord indentation from the disc extrusion
• Moderate canal stenosis (8 mm AP diameter)
• High-intensity zone suggesting annular tear with potential inflammation

When Conservative Management Is Appropriate

If you have:

• Mild to moderate back pain only without neurological deficits
• No myelopathic signs (no spasticity, no hyperreflexia, no bladder issues, no motor weakness)
• No progressive symptoms

Then initial conservative management is reasonable, as symptomatic thoracic disc herniations requiring surgery are rare, accounting for only 1-2% of all discectomies 1.

Critical Clinical Features to Assess

You must evaluate for these myelopathic symptoms:

• Motor/sensory deficits (present in 61% of symptomatic cases)
• Spasticity or hyperreflexia (58% of cases)
• Positive Babinski sign (55% of cases)
• Bladder dysfunction (24% of cases)
• Gait disturbance or difficulty walking

The presence of any progressive or severe myelopathic symptoms strongly favors surgical intervention to prevent permanent neurological damage.

Important Caveats

Thoracic myelopathy is a surgical emergency if progressive. The thoracic spinal cord has limited vascular supply and is particularly vulnerable to compression injury. Unlike lumbar disc herniations where nerve roots can tolerate longer periods of compression, thoracic cord compression with myelopathy can result in permanent disability if not addressed promptly.

Your imaging shows the disc is at T6-T7, which is below T7 where disc herniations are more common 1. The cranial and caudal migration pattern you describe increases the contact area with the spinal cord, potentially worsening compression.

Recommended Action Algorithm

1. Immediate neurosurgical consultation if you have ANY myelopathic signs

2. Urgent surgical evaluation if symptoms are progressive over days to weeks

3. Trial of conservative management (3-6 weeks) ONLY if:

   • Pain is your only symptom
   • No myelopathic signs whatsoever
   • No progressive neurological deterioration
   • Close neurological monitoring is possible

4. Proceed directly to surgery if conservative management fails or symptoms worsen

Bottom Line

Given that your MRI shows actual cord indentation with moderate stenosis, you should have an urgent evaluation by a spine surgeon to assess for clinical myelopathy. The imaging findings alone do not mandate surgery, but they place you at high risk for developing irreversible neurological injury if myelopathy is present or develops. Do not delay this evaluation—thoracic myelopathy outcomes are time-dependent.