Thoracic Disc Herniation: What T6-T7 Through T11-T12 Findings Mean on MRI
A thoracic disc herniation means one of the discs in the middle back is bulging or pushing backward toward the spinal canal. How much it matters depends on whether it touches the spinal cord or nerves, and whether it matches your symptoms.
The phrase “thoracic disc herniation” describes anatomy on an MRI. By itself, it is not a diagnosis of where your pain is coming from.
What a thoracic disc herniation is
The thoracic spine is the middle part of your spine, running from the base of your neck to the bottom of your rib cage. Its vertebrae are labeled T1 through T12, and each disc — the cushion between two vertebrae — is named for the bones above and below it, such as T6-T7 or T11-T12.
A herniation means disc material has pushed out from where it normally sits. In the thoracic spine, that material pushes backward toward the spinal canal, the tunnel that holds the spinal cord and nerves.
Common lower thoracic levels mentioned on MRI reports include:
- T6-T7
- T7-T8
- T8-T9
- T9-T10
- T10-T11
- T11-T12
These herniations are less common than in the neck (cervical spine) or low back (lumbar spine), partly because the rib cage holds the thoracic spine more still while the neck and low back move more. If your report mentions those other areas, see cervical disc herniation or lumbar disc herniation.
The level matters, but it is not the whole story. A small T8-T9 protrusion that does not touch the cord can mean something very different from a larger T8-T9 herniation that compresses it.
Why these reports can be confusing
MRI (magnetic resonance imaging) shows discs, nerves, and the spinal cord in detail, and the report may use several terms that sound alarming:
- Disc bulge: the disc extends outward in a broad way.
- Disc protrusion: a more focused area of disc pushes out.
- Disc extrusion: disc material pushes out farther, beyond the usual disc space.
- Central herniation: the disc pushes toward the middle of the spinal canal.
- Paracentral herniation: the disc pushes backward but slightly to one side.
- Foraminal herniation: the disc pushes toward the foramen, the opening where a nerve exits the spine.
- Canal stenosis: narrowing of the spinal canal.
- Cord flattening: the spinal cord is indented or slightly pressed.
- Cord compression: the spinal cord is being pressed by something, such as a disc.
These do not carry the same level of concern — a mild bulge is not severe cord compression, and a disc that merely touches the cord differs from one causing cord signal change. Findings can also be incidental, seen on MRI but not the cause of your symptoms; still, because thoracic discs sit close to the cord, certain ones deserve careful attention.
Imaging is not the same as symptoms
MRI shows what structures look like; symptoms come from how the body reacts. Pain, numbness, weakness, or walking problems can arise from irritated or compressed nerves, cord involvement, inflammation, or other causes — and a herniation can be present with no symptoms at all. The reverse is also true: mid-back or rib pain may come from muscles, joints, ribs, or internal organs, or from other spine problems such as vertebral compression fractures, small collapses in a spinal bone often related to weak bone. This is why the MRI has to be matched to your symptoms and a neurologic exam of strength, feeling, reflexes, walking, and balance.
Symptoms it can cause
A thoracic disc herniation can cause symptoms but often does not. When it does, they may include:
- Mid-back pain.
- Pain wrapping around the chest wall or ribs.
- Band-like pain around the torso.
- Upper abdominal or flank-like discomfort.
- Numbness or tingling in a band-like pattern.
- Leg heaviness, balance problems, or walking changes if the spinal cord is affected.
- Weakness or coordination problems in more serious cord compression.
Pain that follows a nerve path is called radicular pain; in the thoracic spine it may feel like a band around the ribs or torso. A thoracic herniation does not usually cause classic sciatica (leg pain from irritated low-back nerves), and it does not typically cause arm pain unless there is also a neck problem.
When pain wraps around the ribs, I think about a thoracic nerve pattern — but I am careful not to blame the spine before more urgent chest or abdominal causes are considered.
Why lower thoracic levels come up so often
The lower thoracic spine moves more than the upper thoracic spine, which is locked in by the rib cage. Near T11-T12 and T12-L1 sits the thoracolumbar junction — the transition from the rigid rib-bearing spine to the more mobile lumbar spine — which makes the T12-L1 thoracolumbar junction and lower thoracic levels common sites for wear-and-tear changes. A herniation at T8-T9 may cause different symptoms than one at T11-T12, but again, the direction and what it touches matter more than the level.
Direction: central, paracentral, or foraminal
Direction adds meaning: central raises concern for contact with the cord, paracentral may affect the cord or a nearby nerve, and foraminal tends to cause more one-sided rib or chest-wall symptoms.
The MRI details that matter most
What I look for is not the level alone but whether the disc actually contacts or compresses the spinal cord or a nerve — the size matters less than what it presses on. Key details include:
- Is the spinal cord compressed or flattened?
- Is there cord signal change or myelomalacia?
- Is the spinal canal severely narrowed?
- Is there foraminal stenosis?
- Is the herniation calcified?
- Is more than one level involved?
- Do the level and side match your symptoms?
Cord signal change means the cord looks different on MRI in that area; myelomalacia means softening or injury-like change in the cord tissue — both can matter more than a small protrusion that does not compress the cord. Foraminal stenosis is narrowing of the nerve exit opening. A calcified disc has hardened with calcium-like material and can be more complex to treat if surgery is ever needed.
What “cord flattening” or “cord compression” means
If a disc pushes backward far enough, it can indent or compress the cord. Mild contact or flattening is not always an emergency; it has to be read in context — the degree of compression, cord signal change, symptoms of spinal cord dysfunction, and the neurologic exam.
Spinal cord dysfunction is called myelopathy — the cord not working normally. It can cause leg weakness, balance and walking trouble, stiffness, numbness, or bladder and bowel problems. The finding matters most when cord compression on the MRI matches those symptoms. The same idea applies elsewhere: the neck can develop spinal cord compression and myelopathy too.
What “no cord signal abnormality” means
This usually means no visible injury-like signal change inside the cord, which is reassuring — but it does not replace a neurologic exam, since symptoms can still need evaluation even when the cord signal looks normal.
When it is more concerning
Seek urgent medical attention or emergency care if you have:
- New or worsening leg weakness.
- Trouble walking, new balance problems, or repeated falls.
- Numbness spreading into both legs.
- Loss of bowel or bladder control.
- New urinary retention.
- Numbness in the groin or saddle area.
- Severe, rapidly worsening neurologic symptoms.
- Fever, unexplained weight loss, cancer history, or severe night pain with systemic symptoms.
- Chest pain, shortness of breath, fainting, sweating, or symptoms that could suggest a heart or lung emergency.
Urinary retention means you cannot empty or start emptying your bladder normally. The saddle area is the groin, inner thighs, and the area that would touch a bicycle seat. These are not the usual presentation for most thoracic disc herniations, but they matter because the thoracic spine houses the spinal cord.
How doctors decide whether the disc is the pain source
This is never decided from the MRI level alone; doctors look at the whole pattern:
- History: where the pain is, how it started, what changes it, how long it has lasted.
- Pain pattern: whether it wraps around one side of the ribs or torso.
- Neurologic exam: strength, reflexes, sensation, walking, and balance.
- MRI details: level, side, size, location, cord contact or compression, and nerve involvement.
- Other possible causes: especially when pain feels like chest, rib, flank, or abdominal pain.
- Additional imaging or consultation: when the story is unclear.
The disc is likely the source when level, side, MRI findings, symptoms, and exam all line up. It is probably incidental when they do not.
Why chest, rib, or abdominal pain needs care
Thoracic nerve irritation can create wrapping rib or band-like torso pain, but chest and abdominal symptoms can also come from the heart, lungs, stomach, gallbladder, pancreas, kidneys, or blood vessels. So chest pain — and severe abdominal or flank pain — should not automatically be blamed on a thoracic disc, and a spine finding should not distract from urgent non-spine causes.
Treatment options
Treatment depends on symptoms, exam findings, MRI details, and whether the disc is affecting the cord or a nerve. This section is general education, not a treatment plan for your case.
Without surgery
Many thoracic disc herniations are managed without surgery when there is no progressive neurologic deficit, myelopathy, or severe cord compression. (A neurologic deficit is loss of normal nerve or cord function — weakness, loss of feeling, abnormal reflexes, or trouble walking.) Non-surgical care may include:
- Activity modification.
- Physical therapy for posture, thoracic mobility, and core strength.
- Anti-inflammatory medicines when appropriate.
- Neuropathic (nerve-related) pain medicines in selected cases.
- Time and monitoring when there are no serious deficits.
- Injections in selected cases, depending on anatomy and judgment.
Injections are not right for every thoracic disc problem: the anatomy is tight and the cord is nearby, so risks and benefits depend on the exact case.
When surgery may be considered
Surgery is not based on alarming MRI wording alone. It turns on the neurologic exam, the severity of compression, your symptoms, and whether imaging and symptoms truly line up. It may be considered for:
- Progressive neurologic deficit.
- Signs of thoracic myelopathy.
- Significant spinal cord compression.
- Severe pain that clearly matches the disc level and has not improved with appropriate non-surgical care.
- Large, calcified, or complex herniations in selected cases.
Thoracic disc surgery can be more complex than many low-back operations because of the cord, ribs, chest cavity, and the anatomy involved. The approach depends on the level, location, calcification, and degree of cord compression.
Reading your report more calmly
A thoracic report often lists several levels and terms at once, which makes it feel worse than it is. The level is useful, but the real question is what the disc is touching or compressing — cord contact, flattening, compression, or cord signal change — and whether that matches your symptoms, your side, and your exam. Neurologic symptoms such as weakness, gait changes, balance problems, or bladder/bowel changes are the ones that most need evaluation.
When a written MRI review may help
If your report mentions a disc herniation, cord flattening, canal stenosis, or a level like T8-T9 or T10-T11, it can be hard to know what the finding actually means. SpineClarity offers a written MRI/case review from a board-certified spine surgeon: upload your symptoms, MRI report, and relevant records, and receive a plain-language interpretation with a suggested next-step category. This is not emergency care and does not replace an in-person doctor relationship, but it can help you understand what your report says and what to ask next.
Frequently asked questions
Is a thoracic disc herniation serious?
Sometimes, not always. A small protrusion without cord compression or neurologic symptoms is usually less concerning. One that compresses the cord, causes cord signal change, or matches symptoms like leg weakness or walking trouble is more concerning.
Can a T8-T9 disc herniation cause rib or chest pain?
It can. A T8-T9 herniation may irritate a thoracic nerve and cause pain that wraps around the ribs or chest wall. But chest pain should never be assumed to come from the spine — heart, lung, and gastrointestinal causes may need to be ruled out first, especially with shortness of breath, sweating, fainting, or feeling very unwell.
Can a thoracic disc herniation cause leg symptoms?
Yes, if the spinal cord is affected — heaviness, weakness, stiffness, numbness, balance problems, or walking changes, which are more concerning than isolated mild mid-back pain. New or worsening leg weakness, falls, or bladder/bowel changes should be evaluated urgently.
Why does my report mention multiple thoracic disc protrusions?
Degenerative (wear-and-tear) changes can occur at more than one level. Seeing several protrusions does not mean every level is causing pain; doctors look for the one that best matches your symptoms, exam, and MRI findings.
References
Brown CW, Deffer PA Jr, Akmakjian J, Donaldson DH, Brugman JL. The natural history of thoracic disc herniation. Spine (Phila Pa 1976). 1992;17(6 Suppl):S97-S102.
Wood KB, Blair JM, Aepple DM, Schendel MJ, Garvey TA, Gundry CR, Heithoff KB. The natural history of asymptomatic thoracic disc herniations. Spine (Phila Pa 1976). 1997;22(5):525-529.
Court C, Mansour E, Bouthors C. Thoracic disc herniation: Surgical treatment. Orthopaedics & Traumatology: Surgery & Research. 2018;104(1S):S31-S40.
Yoshihara H. Surgical treatment for thoracic disc herniation: An update. Spine (Phila Pa 1976). 2014;39(6):E406-E412.
McInerney J, Ball PA. The pathophysiology of thoracic disc disease. Neurosurgical Focus. 2000;9(4):e1.
Arce CA, Dohrmann GJ. Thoracic disc herniation: Improved diagnosis with computed tomographic scanning and a review of the literature. Surgical Neurology. 1985;23(4):356-361.
Fessler RG, Sturgill M. Review: Complications of surgery for thoracic disc disease. Surgical Neurology. 1998;49(6):609-618.
NCBI Bookshelf / StatPearls. Thoracic Discogenic Syndrome. StatPearls Publishing.
American College of Radiology. ACR Appropriateness Criteria®: Myelopathy.
American College of Radiology. ACR Appropriateness Criteria®: Thoracic Back Pain.
Gulati M, Levy PD, Mukherjee D, et al. 2021 AHA/ACC/ASE/CHEST/SAEM/SCCT/SCMR Guideline for the Evaluation and Diagnosis of Chest Pain. Circulation. 2021;144(22):e368-e454.
National Institute of Arthritis and Musculoskeletal and Skin Diseases. Back Pain. NIH/NIAMS.
Fehlings MG, Tetreault LA, Riew KD, Middleton JW, Wang JC, et al. A clinical practice guideline for the management of patients with degenerative cervical myelopathy. Global Spine Journal. 2017;7(3 Suppl):21S-27S.