19/06/2026
❓ Why do spontaneous spinal CSF leaks happen in some people but not others? New research has uncovered a possible genetic clue...
*****SCIENTIFIC SUMMARY ******
When the “tough mother” is not so tough: Dura mater literally means tough mother. A tissue named for its mechanical properties important in it’s role protecting the central nervous system and containing CSF. But those properties can be impacted by variations in connective tissue structure.
This important new paper provides “compelling evidence that rare deleterious FBN2 variants are a major genetic risk factor for type 1b spontaneous spinal CSF leaks”, impacting human dural fibroblast binding ability.
*****EASY READING SUMMARY*****
❓ Why do some people develop spontaneous spinal CSF leaks? ❓
A new study may help bring us closer to answering that question.
➡️ Researchers found rare changes in a gene called FBN2 in around 1 in 5 patients (21%) with Type 1b spontaneous spinal CSF leaks.
Type 1b leaks are a specific subtype of spontaneous spinal CSF leak known as lateral spinal CSF leaks. The FBN2 gene helps build and maintain connective tissue throughout the body, including the dura - the membrane that holds cerebrospinal fluid (CSF) around the brain and spinal cord.
The researchers found that some of these genetic changes may affect how the dura is built and maintained, providing a possible explanation for why some people are more vulnerable to developing leaks.
➡️ This finding is important because it relates to spontaneous spinal CSF leaks - leaks that occur without a known cause such as surgery, a lumbar puncture, epidural or trauma. For many people living with a spontaneous leak, the reason it developed has never been clear.
This research provides an important clue as to why some people may be more susceptible to developing spontaneous leaks than others.
This study is an important step forward. While many leaks can be successfully identified and repaired, understanding why they occur remains an important unanswered question.
(NOTE: This study only included patients with Type 1b spontaneous spinal CSF leaks, so it is not yet known whether these findings apply to other leak types).
📖 Reference
Parks, C., et al. (2026). Spontaneous spinal CSF leaks: A rare variant exome sequencing study and functional analysis. The Lancet Neurology, 25(7), 664-672.
https://doi.org/10.1016/S1474-4422(26)00140-7
Rare deleterious variants in FBN2 might cause type 1b spontaneous spinal CSF leak, supporting the integration of FBN2 genetic testing into clinical practice. As in other connective tissue diseases, the disruption of cell adhesion to extracellular matrix proteins might participate in the pathophysiol...
