Pediatrics · Tethered Cord Syndrome

Recognizing the Signs of Tethered Cord Syndrome

At a Glance

Tethered cord syndrome in children with lipomyelomeningocele (LMMC) occurs when a fatty mass pulls on the spinal cord during growth. Early signs include lower back skin marks, frequent urinary accidents, leg weakness, and foot deformities. Early detection helps protect nerve function.

Because the fatty mass in lipomyelomeningocele (LMMC) is physically attached to the spinal cord, it can act like an anchor. As your child grows, this anchor pulls on the cord, causing a condition called tethered cord syndrome (TCS) ^[1]^[2]. Recognizing the early signs of this “tugging” is one of the most important roles you have as a parent, as early detection allows your medical team to protect your child’s nerve function ^[3]^[4]. For an overview of the condition, visit the Home Page.

Visible Marks on the Lower Back

In many cases, the first sign of LMMC is a visible marker on the skin over the lower spine. These are often called “cutaneous stigmata” and serve as a “window” into the spinal defect ^[5]^[6]. Common signs include:

Fatty mass: A soft, painless lump just under the skin ^[7]^[8].
Deep dimple: A small hole or indentation in the skin ^[9].
Hair patch: A tuft of hair, sometimes called a “faun’s tail” ^[10]^[11].
Skin changes: A birthmark (hemangioma), a skin tag, or a discoloration of the skin ^[12]^[13].

Internal Symptoms of Tethered Cord

As the spinal cord is stretched, it can affect three main areas of the body: the nerves (neurological), the bladder and bowels (urological), and the bones and joints (orthopedic).

1. Urological and Bowel Symptoms (The “Silent” Signs)

Changes in bladder function are often the first—and most subtle—signs of tethering ^[14]. Because these changes happen inside the body, they are often “silent” until they become advanced.

Neurogenic Bladder: This is a bladder that doesn’t empty or fill correctly because the nerve signals are disrupted ^[15].
Symptoms to watch for: Frequent urinary tract infections (UTIs), constant dribbling of urine, or sudden “accidents” in a child who was previously potty trained ^[16]^[17].
The Importance of UDS: Because bladder changes are hard to see, doctors use Urodynamic Studies (UDS). This test measures the pressure inside the bladder and how well it empties ^[15]^[18]. A “baseline” UDS is essential to know what is normal for your child so that small, internal changes can be caught early ^[5]^[18].

2. Neurological Symptoms

Nerve signals to the lower body can be disrupted by the tension on the spinal cord.

Weakness or Pain: Your child may have weakness in their legs, or you may notice them limping or tripping more often ^[19]^[16].
Sensory Changes: They may experience numbness, tingling, or “pins and needles” in their feet and legs ^[8].
Movement Issues: Babies might show a difference in how they kick their legs or move their toes ^[16].

3. Orthopedic Symptoms

Over time, the constant pull on the spinal cord and nerves can affect how the body grows and aligns itself.

Foot Deformities: You may notice high arches, “clawed” toes, or one foot appearing smaller or turned differently than the other ^[20]^[21].
Spinal Changes: The spine may begin to curve (scoliosis) or develop an abnormal hump (kyphosis) ^[22]^[21].
Limb Differences: One leg may appear slightly thinner or shorter than the other due to differences in muscle development ^[20].

If symptoms appear, surgical intervention may be required. Read more in Surgery and the ‘Watch and Wait’ Debate.

Common questions in this guide

What are the visible signs of a tethered cord on a baby's back?

Common visible signs include a soft fatty mass, a deep dimple, a tuft of hair often called a faun's tail, or skin discolorations over the lower spine. These marks act as a window indicating a potential spinal defect beneath the skin.

How can I tell if my child has a neurogenic bladder?

Bladder changes are often the first hidden signs of tethering. You might notice frequent urinary tract infections, constant urine dribbling, or sudden potty training regressions in a child who was previously trained.

What are urodynamic studies (UDS) and why are they important?

Urodynamic studies measure the pressure inside the bladder and how well it empties. Getting a baseline test is critical because it helps doctors catch small, internal changes to the bladder before they become severe.

Can a tethered spinal cord affect my child's legs and feet?

Yes, the tension on the spinal cord can cause nerve disruptions leading to leg weakness, limping, numbness, or tingling. Over time, it can also cause orthopedic issues like high arches, clawed toes, or one leg appearing shorter than the other.

How does a tethered cord impact my child's spine as they grow?

The constant pulling on the spinal cord and nerves can alter how the body aligns itself. This tension can lead to spinal curvatures such as scoliosis or an abnormal hump known as kyphosis.

Curated prompts to bring to your next appointment.

1.My child seems to have more accidents than usual—could this be a sign of neurogenic bladder?
2.When should my child have their first baseline urodynamic study (UDS)?
3.How often should we check for spinal changes like scoliosis as my child grows?
4.Are there specific sensory changes, like tingling or numbness in the feet, that I should look for in a toddler?
5.How do I distinguish between normal potty training challenges and symptoms of tethered cord syndrome?

Tap a prompt to share your answer — we'll use it plus this page's context to start a tailored conversation.

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This page is for informational purposes only and does not replace professional medical advice. Always consult your child's pediatrician or pediatric neurosurgeon if you suspect signs of tethered cord syndrome.

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