What is Lipomyelomeningocele

Lipomyelomeningocele is a form of closed spinal dysraphism characterized by a fatty mass (lipoma) that extends through a defect in the spinal column, tethering and compressing the spinal cord. It is a congenital condition present from birth that often requires neurosurgical intervention to prevent progressive neurological impairment.

What exactly is Lipomyelomeningocele?

Lipomyelomeningocele occurs during embryonic development when the neural tube fails to close completely. This allows fatty tissue from outside the spinal canal to attach to the spinal cord. As a child grows, this fatty mass, or lipomyelomeningocele, pulls on the spinal cord—a process known as tethered cord syndrome—which can cause damage to the nerves that control movement, sensation, and bladder or bowel function.

How does Lipomyelomeningocele affect the body?

The primary impact of Lipomyelomeningocele involves the neurological system. Because the spinal cord is anchored by the lipoma, it cannot move freely within the spinal canal. Common manifestations include:

• Progressive weakness or numbness in the legs or feet.


• Foot deformities (such as high arches or clubfoot).


• Bladder and bowel dysfunction, such as incontinence or retention.


• Back pain or localized pain at the site of the fatty mass.


• Visible skin stigmata on the lower back, such as a dimple, tuft of hair, or subcutaneous mass.

Is Lipomyelomeningocele a rare condition?

Lipomyelomeningocele is considered a rare congenital anomaly, though exact global prevalence rates are difficult to determine because some cases remain asymptomatic for years. It is a subtype of spinal dysraphism, which collectively affects approximately 1 in 1,000 to 2,000 live births. At DiseaseMaps.org, 40 community members have already joined to share their personal experiences with this diagnosis.

How is this different from other spinal conditions?

Unlike an open myelomeningocele (spina bifida aperta), Lipomyelomeningocele is a "closed" lesion, meaning the spinal cord is covered by skin. This often results in a delayed diagnosis compared to open forms of spina bifida. Differentiation is typically confirmed via MRI, which clearly visualizes the lipoma and the degree of tethering.

Next steps

• Consult a pediatric neurosurgeon for a formal evaluation and baseline MRI imaging.


• Monitor for any changes in gait, strength, or bladder control, which may indicate the need for surgical detethering.


• Connect with the 40 members of the DiseaseMaps.org Lipomyelomeningocele community to share experiences and coping strategies.


• Maintain regular follow-ups with a multidisciplinary team, including urologists and physical therapists.

Medical disclaimer: This information is for educational purposes only and does not constitute professional medical advice, diagnosis, or treatment; always seek the advice of a qualified physician with any questions regarding a medical condition.

References

• NIH Genetic and Rare Diseases Information Center (GARD): Spinal Dysraphism.


• Orphanet: Rare diseases database.


• OMIM (Online Mendelian Inheritance in Man): Entry for spinal dysraphism.


• Spina Bifida Association (SBA): Educational resources on tethered cord and lipomas.