Which are the causes of Lipomyelomeningocele?

Lipomyelomeningocele is a form of closed spinal dysraphism caused by the incomplete fusion of the neural tube during the first month of embryonic development. While the exact etiology remains incompletely understood, it is generally considered a multifactorial condition resulting from a complex interplay between genetic predisposition and environmental influences during early pregnancy.

What causes Lipomyelomeningocele to develop?

The primary cause of Lipomyelomeningocele is a failure of the neural tube to close properly between the third and fourth weeks of gestation. This allows fatty tissue (lipoma) to grow through a defect in the spinal column, tethering the spinal cord. Think of it like a zipper on a jacket that gets stuck; because the "zipper" of the spinal canal didn't close fully, tissue that shouldn't be there interferes with the cord's normal development.

Is Lipomyelomeningocele a hereditary condition?

Lipomyelomeningocele is not typically caused by a single gene mutation. Instead, it is considered a polygenic or multifactorial trait. While most cases occur sporadically, there is a slightly increased risk of recurrence in families where a neural tube defect has previously occurred. Genetic research continues to investigate how variations in folate metabolism genes may contribute to the risk of Lipomyelomeningocele.

What are the known risk factors for Lipomyelomeningocele?

Distinguishing between causes (the biological mechanism) and risk factors (external influences) is vital. While we cannot always pinpoint the exact cause, several factors are associated with a higher incidence of Lipomyelomeningocele:

• Maternal folate deficiency: Insufficient folic acid intake during the periconceptional period is a well-documented risk factor.


• Maternal diabetes: Pre-existing or gestational diabetes can disrupt fetal development.


• Medications: Use of certain anti-seizure medications (such as valproic acid) during early pregnancy.


• Maternal hyperthermia: High fever or exposure to high temperatures in early pregnancy.

Current research into Lipomyelomeningocele

Researchers are currently focusing on the role of epigenetics and environmental toxins in the development of Lipomyelomeningocele. By studying the 40 individuals in our DiseaseMaps community and others globally, scientists hope to better understand why the neural tube fails to close in specific cases, potentially leading to better preventative strategies.

Next steps

• Consult a pediatric neurosurgeon to discuss imaging and potential tethered cord management.


• Schedule an appointment with a genetic counselor to discuss family history and recurrence risks.


• Join the DiseaseMaps community to connect with others sharing their experiences with Lipomyelomeningocele.

Medical disclaimer: This information is for educational purposes only and should not replace professional medical advice, diagnosis, or treatment.

References

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


• Orphanet: Spinal dysraphism (ORPHA: 79294).


• OMIM (Online Mendelian Inheritance in Man): Neural Tube Defects.


• Spina Bifida Association: Understanding Closed Neural Tube Defects.