9 Key Spina Bifida Signs to Watch For

For many families, noticing unusual changes in a child’s development or physical health can raise important questions about whether something more serious is happening. Spina bifida is one condition where early awareness can make a meaningful difference, as this birth defect affects the development of the spine and spinal cord during pregnancy. Recognizing the key spina bifida signs to watch for may help parents and caregivers seek medical guidance sooner and understand what symptoms may require attention.

Spina bifida occurs when the neural tube, which later develops into the brain and spinal cord, does not close completely during early pregnancy. According to health estimates, spina bifida affects approximately 1 in every 2,500 births worldwide, although rates can vary significantly by region. In the United States, around 1,500 babies are born with spina bifida each year, making it one of the most common neural tube defects.

The severity of spina bifida can range widely. Some individuals may have mild symptoms with little impact on daily life, while others may experience significant challenges involving movement, bladder and bowel control, sensation, or neurological function. Because the condition affects the spinal cord and nerves, the signs can appear in different ways depending on where the spinal opening occurs and how much nerve tissue is involved.

Some signs may be visible at birth, such as changes along the spine, a small opening, a skin-covered lump, or unusual skin markings on the back. Other signs may become noticeable later, including delayed motor development, difficulty walking, muscle weakness, or problems with bladder control. In some cases, symptoms related to nerve complications may not become obvious until childhood.

In this guide, we will explore 9 key spina bifida signs, explain why they happen, and discuss when seeking medical advice may be important. Continue reading to learn more about this condition and the symptoms that should not be overlooked.

Table of Contents

9 Key Symptoms of Spina Bifida to Watch For?

Sac-Like Protrusion

This is the hallmark symptom of the two most severe forms, myelomeningocele and meningocele. In myelomeningocele, this sac contains the meninges (the membranes protecting the spinal cord), spinal fluid, and a portion of the spinal cord and nerves.

The skin covering this sac is often thin, fragile, and may even be open, exposing the delicate neural tissues to the environment. This open lesion creates a high risk of life-threatening infections, such as meningitis, and necessitates immediate neurosurgical intervention within 24 to 72 hours of birth. In the rarer meningocele form, the sac contains meninges and spinal fluid but not the spinal cord itself, which remains safely within the spinal canal.

Abnormal Tuft of Hair, Dimple, or Birthmark

These signs are most commonly associated with spina bifida occulta, the hidden form of the condition. Because there is no opening in the back, the defect is not immediately obvious. However, a small patch of hair growing over the lumbosacral region, a deep pit or dimple (known as a sacral dimple), or a birthmark like a red or purple spot (hemangioma) or a fatty lump (lipoma) can signal an underlying malformation of the vertebrae.

While spina bifida occulta often causes no neurological symptoms, the presence of these cutaneous markers warrants further diagnostic imaging, such as an ultrasound or MRI, to rule out more complex issues like a tethered spinal cord.

Paralysis and Muscle Weakness

The level of motor function is determined by the location of the opening on the spine. A lesion higher up on the back (thoracic region) will affect more nerves and typically results in complete paralysis of the legs, requiring the full-time use of a wheelchair.

A lesion lower down (lumbar or sacral region) may result in muscle weakness and partial paralysis, allowing for some individuals to walk with the assistance of braces, crutches, or walkers. This muscle imbalance, where some muscles function while their opposing muscles do not—is a primary cause of the orthopedic issues commonly seen in spina bifida.

Lack of Sensation

The damaged nerves are unable to transmit sensory information, such as touch, pressure, pain, and temperature, from the skin to the brain. This lack of protective sensation means an individual may not be aware of injuries like cuts, blisters, burns, or pressure sores on their feet and legs.

Consequently, diligent daily skin inspection and proper foot care are critical lifelong habits to prevent serious wounds and infections that can lead to severe complications. This sensory deficit also affects proprioception, the body’s ability to sense its position in space, which can further impact balance and coordination.

Neurogenic Bladder

The nerves responsible for coordinating the bladder muscle (detrusor) and the urinary sphincter do not work correctly. This can lead to two main problems: the bladder may not empty completely (retention), which can cause urine to back up into the kidneys, leading to damage and failure, or the sphincter may be too weak to hold urine, resulting in constant leaking (incontinence).

The standard of care for managing a neurogenic bladder is a procedure called clean intermittent catheterization (CIC), where a catheter is inserted into the bladder every few hours to drain it completely. This proactive management prevents urinary tract infections (UTIs) and protects kidney health.

Neurogenic Bowel

Similar to the bladder, the nerves controlling the anal sphincter and the muscles that facilitate bowel movements are impaired. This typically leads to a combination of chronic constipation (due to poor motility in the colon) and fecal incontinence (due to the inability to control the sphincter).

A structured daily bowel program is essential for achieving social continence and preventing health complications. This program usually involves a combination of dietary management, medications (like laxatives or stool softeners), and techniques such as suppositories or enemas administered at a scheduled time each day to promote a predictable bowel movement.

Clubfoot (Talipes Equinovarus)

This is one of the most common orthopedic deformities seen at birth in infants with spina bifida. The foot is twisted downward and inward, resembling the head of a golf club. This occurs because the muscles that pull the foot inward are stronger than the weakened muscles that would normally pull it outward.

Treatment typically begins within weeks of birth using the Ponseti method, which involves a series of manipulations and casts to gradually correct the foot’s position. In some cases, surgery may be required to release tight tendons.

Hip Dysplasia and Dislocation

The muscles around the hip joint are often weak and imbalanced, leading to instability. This can cause the hip socket (acetabulum) to be too shallow to properly hold the head of the thigh bone (femur), a condition known as dysplasia.

In more severe cases, the femur can completely slip out of the socket, which is a hip dislocation. Orthopedic surgeons closely monitor hip development in children with spina bifida through physical exams and X-rays. Treatment may include bracing or complex surgical procedures to reposition and stabilize the hip joint, aimed at providing a level pelvis for stable sitting and, if possible, standing or walking.

Scoliosis and Kyphosis

Abnormal curvatures of the spine are very common, especially during periods of rapid growth in adolescence. Scoliosis is a sideways C- or S-shaped curve, while kyphosis is a severe forward rounding of the upper back. These curves are caused by muscle weakness along the trunk and vertebral abnormalities.

Mild curves may be monitored, while more progressive curves are often treated with a back brace to slow their progression. For severe deformities that impact sitting balance, breathing, or cause pain, spinal fusion surgery is often necessary to correct the curve and stabilize the spine.

What is Spina Bifida and What are its Main Types?

Spina bifida is a type of neural tube defect where a baby’s spine and spinal cord fail to form and close properly during the first month of pregnancy, with its three main types being myelomeningocele, meningocele, and spina bifida occulta.

What is Myelomeningocele (Open Spina Bifida)?

Myelomeningocele is the most severe and most common form of spina bifida, where the infant’s spinal canal remains open along several vertebrae in the back, allowing both the protective membranes (meninges) and the spinal cord itself to protrude through the opening in a fluid-filled sac.

This exposure of the most delicate parts of the central nervous system makes the infant highly susceptible to life-threatening infections and is the cause of significant, permanent nerve damage.

More specifically, the key characteristics and consequences of myelomeningocele are severe and multifaceted. Because the spinal cord and its nerves are not properly formed and are exposed, they are damaged. This results in some degree of paralysis and loss of sensation below the level of the spinal lesion.

The functional impact is directly related to the location of the opening; a lesion in the upper back will cause more extensive paralysis than one in the lower back. This nerve damage is also the root cause of the lifelong bowel and bladder control issues that affect nearly every individual with this condition.

Moreover, myelomeningocele is almost universally accompanied by other serious neurological issues. Hydrocephalus, a condition where excess cerebrospinal fluid (CSF) builds up in the ventricles of the brain, occurs in approximately 80-90% of cases. This requires the surgical implantation of a shunt system to drain the fluid and relieve pressure on the brain.

Additionally, most infants with myelomeningocele have a Chiari II malformation, a structural defect where the brainstem and cerebellum protrude down into the spinal canal, which can affect breathing, swallowing, and upper body motor control.

An infant born with myelomeningocele requires surgery within 24 to 72 hours of birth. The primary goal of this surgery is to close the opening on the back to prevent infection (like meningitis) and to protect the exposed spinal cord from any further trauma. While this surgery is critical for survival, it cannot reverse the nerve damage that has already occurred.

Meningocele vs. Myelomeningocele

Meningocele differs from myelomeningocele primarily in the contents of the protruding sac on the baby’s back; in meningocele, the sac contains only the meninges and cerebrospinal fluid, while the spinal cord and nerves remain safely within the normal spinal canal. This fundamental distinction means that the spinal cord itself is not exposed or displaced, resulting in significantly less nerve damage and a much better prognosis compared to myelomeningocele.

The defining feature of meningocele is that the spinal cord develops normally and is not part of the external sac. Because the nerves are not directly impacted, individuals with meningocele typically have no paralysis. While some may experience minor functional disabilities, such as some bowel and bladder control issues, the severe motor and sensory deficits characteristic of myelomeningocele are absent.

Like myelomeningocele, meningocele requires surgery shortly after birth. The procedure involves removing the fluid-filled sac and closing the opening in the back to protect the underlying meninges. The surgical outcome is generally excellent, and with the closure of the defect, many children experience no long-term health problems related to the condition. Unlike myelomeningocele, hydrocephalus and other associated brain malformations are not typically present with meningocele.

Meningocele is one of the rarest forms of spina bifida. Its diagnosis and initial appearance can be alarming for parents as it still presents as a visible sac on the infant’s back. However, once diagnostic imaging like an MRI confirms that the spinal cord is not involved, the long-term outlook is far more positive, setting it clearly apart from the much more severe myelomeningocele.

What is Spina Bifida Occulta (“Hidden” Spina Bifida)?

Spina bifida occulta is the mildest and most prevalent form of spina bifida, characterized by a small separation or gap in one or more of the bones of the spine (vertebrae), but crucially, there is no opening or sac on the back because the skin covers the defect, and the spinal cord and nerves are typically unaffected.

The name “occulta,” which is Latin for “hidden,” aptly describes this condition, as it often causes no symptoms and frequently goes undiagnosed throughout a person’s life.

In the overwhelming majority of cases, individuals with spina bifida occulta experience no neurological or physical disabilities. The gap in the vertebrae is so minor that it does not impact the function of the spinal cord or nerves. As a result, there is no paralysis, no sensory loss, and no bowel or bladder dysfunction. Many people are unaware they have the condition until it is discovered incidentally during an X-ray or other imaging test performed for an unrelated reason.

Although the spinal defect itself is hidden, its presence is sometimes signaled by a visible abnormality on the skin of the lower back, directly over the site of the vertebral gap. These markers can include an abnormal tuft of hair, a small and deep dimple (sacral dimple), a dark spot or red birthmark, or a small collection of fat (lipoma).

While these signs are often benign, they can sometimes be associated with a more complex underlying issue known as tethered cord syndrome, where the spinal cord is abnormally attached to surrounding tissues, which can cause symptoms as a child grows. Therefore, the presence of these markers usually prompts pediatricians to recommend further investigation with an ultrasound or MRI.

Spina bifida occulta is a relatively common condition, estimated to affect up to 10-20% of the general population. Due to its typically benign nature, it is not considered a significant health problem and generally requires no treatment. It stands in stark contrast to the open forms of spina bifida, representing the mildest end of the neural tube defect spectrum.

Spina Bifida Diagnosis

Spina bifida is most commonly diagnosed during pregnancy through a series of routine prenatal screening and diagnostic tests designed to assess fetal development and identify potential abnormalities.

The process often begins with a maternal blood test known as the maternal serum alpha-fetoprotein (MSAFP) screen, which is part of the “quad screen” performed between 15 and 20 weeks of gestation. This test measures the level of alpha-fetoprotein (AFP), a protein produced by the fetus, in the mother’s blood.

An abnormally high level of AFP can be an indicator of an open neural tube defect like spina bifida, as the protein can leak from the fetal opening into the amniotic fluid and then into the mother’s bloodstream. However, since this is a screening test and not a definitive diagnosis, an elevated AFP level prompts further investigation.

Following an abnormal MSAFP screen, the next step is typically a detailed fetal ultrasound. A high-resolution ultrasound can visually inspect the fetus’s spine for an opening or sac, and it can also identify characteristic signs in the brain, such as the “lemon sign” (a scalloping of the frontal bones) or the “banana sign” (an abnormal shape of the cerebellum), which are strongly associated with spina bifida.

If the ultrasound confirms suspicion or remains inconclusive, a diagnostic procedure called amniocentesis may be recommended. This involves taking a small sample of amniotic fluid to directly measure AFP levels and test for another substance called acetylcholinesterase (AChE), which is typically found only in the cerebrospinal fluid. The presence of AChE in the amniotic fluid is a very strong indicator of an open neural tube defect.

Long-term Health Complications of Spina Bifida

Individuals born with spina bifida, particularly the most severe form, myelomeningocele, face a variety of long-term health complications that require ongoing, specialized medical care throughout their lives. One of the most common and serious associated conditions is hydrocephalus, which is an accumulation of excess cerebrospinal fluid (CSF) in the brain’s ventricles, leading to increased pressure on the brain.

This condition is almost always managed by surgically implanting a shunt, a thin tube that drains the excess fluid from the brain to another part of the body, usually the abdominal cavity, where it can be absorbed. Another frequent complication is the Chiari II malformation, a structural defect where brain tissue from the cerebellum and brainstem extends down into the spinal canal, which can disrupt the flow of CSF and contribute to hydrocephalus.

Beyond these primary neurological issues, many individuals experience tethered cord syndrome, where scar tissue binds the spinal cord to the surrounding tissues, preventing it from moving freely within the spinal column as the child grows. This stretching of the cord can cause progressive neurological damage, leading to pain, weakness, loss of sensation, and changes in bowel or bladder function.

Mobility challenges are also prevalent, often requiring the use of braces, crutches, or a wheelchair. Urinary and bowel control is frequently impaired due to nerve damage, necessitating management strategies like catheterization and bowel programs. Furthermore, a significant percentage of individuals with spina bifida develop learning disabilities, particularly with executive functions like attention and problem-solving, and have a notably high incidence of latex allergies, requiring careful avoidance of latex-containing products in medical and daily settings.

How to Prevent Spina Bifida

While it is not possible to prevent all cases of spina bifida, as the exact causes involve a complex interplay of genetic and environmental factors, a significant number of cases can be prevented through adequate intake of folic acid.

Folic acid, a B vitamin, is essential for proper cell division and the development of the neural tube, which forms the brain and spinal cord during the first few weeks of pregnancy. The neural tube typically closes by the 28th day after conception, often before a woman is even aware she is pregnant. Because this critical developmental window occurs so early, it is imperative that women of childbearing age have sufficient folic acid levels before becoming pregnant.

For this reason, public health organizations like the Centers for Disease Control and Prevention (CDC) strongly recommend that all women capable of becoming pregnant consume 400 micrograms (mcg) of folic acid daily, even if they are not actively planning a pregnancy. This can be achieved through a daily supplement or a multivitamin containing the recommended amount.

For women who have a higher risk of having a child with a neural tube defect, for instance, those who have previously had an affected pregnancy or have spina bifida themselves, a much higher dose of 4,000 mcg of folic acid per day is typically recommended, starting at least one month before conception and continuing through the first trimester.

Fortification of staple foods like bread, cereal, and pasta with folic acid has also proven to be a highly effective public health strategy, significantly reducing the incidence of spina bifida and other neural tube defects in many countries.

The Differences Between Spina Bifida and Other Neural Tube Defects

Spina bifida and anencephaly are both major neural tube defects (NTDs), meaning they result from the incomplete closure of the neural tube during early embryonic development, but they differ fundamentally in the location of the defect and the resulting prognosis. The key distinction lies in which part of the neural tube fails to close.

Spina bifida occurs when the caudal, or lower, end of the neural tube does not close properly. This results in an opening along the spinal column, with severity ranging from spina bifida occulta (a hidden gap in the vertebrae with no nerve involvement) to meningocele (a sac of fluid protruding through the opening) and myelomeningocele (the most severe form where the spinal cord and nerves are exposed in the sac).

While it causes significant lifelong physical and neurological disabilities, individuals with spina bifida typically have a normal life expectancy with appropriate medical care.

In stark contrast, anencephaly is a defect at the cephalic, or upper, end of the neural tube. This failure of closure results in the absence of a major portion of the brain, skull, and scalp. The forebrain and cerebrum, which are responsible for cognition, consciousness, and voluntary movement, do not develop. The remaining brainstem may be exposed.

Anencephaly is a catastrophic and universally fatal condition. Infants born with anencephaly are typically blind, deaf, unconscious, and unable to feel pain. Most are stillborn or die within a few hours or days of birth. Therefore, the primary difference is one of location and viability: spina bifida affects the lower spine and is a condition that individuals live with, whereas anencephaly affects the brain and is incompatible with life.

FAQs

1. Can a person live with spina bifida?

Yes, many people with spina bifida live long and fulfilling lives. The impact of the condition depends on the type of spina bifida, the location of the spinal defect, and the level of nerve involvement. With proper medical care, therapy, and support, many individuals are able to manage symptoms, pursue education, work, and maintain active lifestyles.

2. Are you able to walk with spina bifida?

Some people with spina bifida can walk independently, while others may need mobility support such as braces, crutches, walkers, or wheelchairs. The ability to walk often depends on where the spinal opening occurs and how much the nerves controlling the legs are affected.

3. What is the average life span of a person with spina bifida?

Life expectancy for people with spina bifida has improved significantly due to advances in medical treatment and supportive care. Many individuals with mild or moderate forms have a near-normal life expectancy. Those with more severe complications may require ongoing medical management that can affect overall health outcomes.

4. What’s the worst case of spina bifida?

The most severe form of spina bifida is myelomeningocele, where part of the spinal cord and nerves protrude through an opening in the spine. This type can lead to major complications, including muscle weakness, paralysis, hydrocephalus (fluid buildup in the brain), and bladder or bowel control problems.

5. Is spina bifida painful?

Spina bifida itself does not always cause pain, but some people may experience discomfort related to nerve problems, muscle strain, orthopedic issues, or complications affecting the spine. Pain levels vary greatly between individuals.

6. Do all people with spina bifida need a wheelchair?

No. Not everyone with spina bifida uses a wheelchair. Some individuals walk without assistance, while others use wheelchairs for long distances or daily mobility depending on their physical abilities and symptoms.

7. Which celebrity has spina bifida?

Several public figures have shared their experiences living with spina bifida, including John Cougar Mellencamp, who was born with spina bifida and has spoken publicly about overcoming health challenges. Public awareness from individuals with the condition has helped highlight that people with spina bifida can achieve success in many areas of life.

8. Is spina bifida linked to autism?

Current research does not show that spina bifida directly causes autism. However, some individuals with spina bifida may have learning, attention, or developmental challenges, and researchers continue to study how neurological conditions may overlap.

Conclusion

Spina bifida is a complex condition that can affect the spine, nerves, movement, and daily functioning in different ways. Understanding the 9 key spina bifida signs can help parents, caregivers, and individuals recognize possible symptoms and seek appropriate medical evaluation when needed.

While some cases may involve significant physical challenges, many people with spina bifida are able to live meaningful, active lives with the right combination of medical care, rehabilitation, and support. Early recognition, ongoing monitoring, and personalized treatment plans can play an important role in improving quality of life.

If symptoms such as unusual changes along the spine, movement difficulties, muscle weakness, or bladder and bowel concerns appear, discussing them with a healthcare professional can help determine the next steps. Awareness and early attention remain important tools in managing spina bifida and supporting long-term health.

References

Disclaimer This article is intended for informational and educational purposes only. We are not medical professionals, and this content does not replace professional medical advice, diagnosis, or treatment. We aim to provide reliable resources to help you understand various health conditions and their causes. If you are experiencing persistent, severe, or concerning symptoms, you should seek guidance from a qualified healthcare provider. Read the full Disclaimer here →