What Is Tethered Cord Syndrome & Its Causes?
Tethered cord syndrome (ICD-10 Q06.8) is a condition in which the lower end of the spinal cord is abnormally attached to surrounding tissue, so it is stretched with growth and movement. This can cause back and leg pain, leg weakness or numbness, and bladder or bowel problems. It may be noticed at birth or cause symptoms for the first time in adulthood.
Normally the lower end of the spinal cord (the conus) floats freely in the spinal canal. In a tethered cord it is attached to surrounding tissue and often lies lower than normal. Because it cannot move freely, it is stretched with growth, bending, and activity, reducing blood flow and function in the part of the cord that controls the legs, bladder, and bowel.
Tethered cord syndrome restricts the normal movement of the spinal cord, placing it under tension during growth and daily activity. Medically reviewed by Dr Jaydev Panchawagh, MS (General Surgery), MCh (Neurosurgery), Consultant Neurosurgeon, Pune (Last reviewed: [DD Month 2026]). For educational purposes only; individual outcomes vary and this content is not a substitute for personal medical advice.
Causes
The thin strand at the end of the cord is thickened. The most common cause.
A fatty mass fused with the lower cord, sometimes extending to the skin (lipomyelomeningocele).
The cord divided in two, sometimes by a bony spur.
A channel from the skin to the spinal canal, which can allow infection, or scar tissue after earlier spinal surgery such as spina bifida repair.
Video: Tethered spinal cord and its treatment, explained by Dr Jaydev Panchawagh, neurosurgeon, Pune.
Symptoms at Different Ages & Diagnosis
| Age | What to Look For |
|---|---|
| Babies | A dimple, tuft of hair, fatty lump, birthmark, or skin tag over the lower back. |
| Children | Bladder problems or new bed-wetting, constipation or soiling, change in walking, foot deformity, unequal legs, back or leg pain, scoliosis. |
| Adults | Back and leg pain made worse by bending or activity, leg numbness or weakness, and bladder, bowel, or sexual problems — sometimes for years before diagnosis. |
Fever, headache, neck stiffness, or vomiting in a child with a skin opening over the lower back can indicate meningitis and needs emergency care. Rapidly worsening leg weakness or new loss of bladder or bowel control also needs urgent assessment.
Diagnosis
- 1
MRI of the spine: Shows the low-lying cord and the cause of tethering.
- 2
Spinal ultrasound: For screening in young babies.
- 3
Urodynamic studies: Measure bladder function and track change.
- 4
Additional testing: Nerve studies, kidney ultrasound, and CT when needed.
Treatment Options
Treatment depends on the cause and on whether symptoms are progressing. Progressive symptoms, a dermal sinus tract, and a symptomatic tight filum usually lead to surgery — detethering of the spinal cord, which releases the attachment. For some people without symptoms, particularly with certain lipomas, careful observation with regular examination, bladder tests, and MRI is reasonable.
Detethering releases the tension and aims to prevent further damage; observation watches for change. Each is right in different situations. The choice should follow the anatomy of your condition, your own circumstances — your health, your work, and what matters to you in recovery — and the advice of your neurosurgeon after examining you and reviewing your scans.
Questions to Ask Your Neurosurgeon
These are the questions patients and parents most often search for after a diagnosis of tethered cord:
- 1
Tethering cause: What is causing the tethering in my case (or my child's)?
- 2
Symptom progression: Are the symptoms progressing, and which tests will track this?
- 3
Surgical indication: Does tethered cord always need surgery, or can it be watched?
- 4
Bladder involvement: Is the bladder affected, and do we need urodynamic tests?
- 5
Imaging schedule: How often will follow-up MRI be needed?
- 6
Multidisciplinary care: Which other specialists should be involved?
Unless there is an emergency, spine surgery is a planned decision. Seeking a second opinion from a qualified spine surgeon or neurosurgeon before deciding is entirely appropriate.
Frequently Asked Questions
General information only. Please consult a qualified spine surgeon or neurosurgeon for advice about your situation.
Tethered cord syndrome is a condition in which the lower end of the spinal cord is abnormally attached to surrounding tissue, so it is stretched with growth and movement. This can cause back and leg pain, leg weakness or numbness, and bladder or bowel problems.
The most common cause is a tight or fatty filum terminale. Others include a lumbosacral lipoma, split cord malformation, dermal sinus tract, and scar tissue after earlier spinal surgery such as spina bifida repair.
Yes. Some people with a tethered cord have no symptoms in childhood and develop back and leg pain, numbness, weakness, or bladder problems for the first time as adults, often made worse by bending or activity.
Signs over the lower back include a dimple above the buttock crease, a tuft of hair, a fatty lump, a birthmark, or a skin tag. A baby with these signs may need a spinal ultrasound or MRI.
Some people without symptoms can be observed with regular examination, bladder tests, and MRI. When symptoms are progressing, or there is a dermal sinus tract, surgery to release the tether is usually advised.
Tethered cord syndrome is treated by neurosurgeons, often working with urologists and physiotherapists. Dr Jaydev Panchawagh—MBBS (B.J. Medical College, Pune), MS in General Surgery (KEM Hospital, Pune), and MCh in Neurosurgery (Seth GS Medical College and KEM Hospital, Mumbai)—is a consultant neurosurgeon in Pune (102, Bhagyatara Society, Erandwane, Pune, Maharashtra 411004; Tel: +91-9011333841) who assesses tethered cord and performs detethering surgery.
