Related Experiment Videos
Frequency of unexplained meningeal enhancement in the brain after lumbar puncture
1Department of Radiology, Hospital of the University of Pennsylvania, Philadelphia 19104.
Purpose:
To examine the hypothesis that lumbar puncture alone may cause meningeal enhancement in the brain.
Methods:
We prospectively reviewed the brain MR examinations of all patients from a 6-month period who were studied within 1 month after lumbar puncture. We also retrospectively reviewed all cases of dural-arachnoidal enhancement in the brain from the preceding 18-month period.
Results:
In the prospective group, only one case out of 97 enhanced brain MR examinations after lumbar puncture did not have a clear cause for dural-arachnoidal enhancement. In the retrospective group, only one case out of 11 with enhancement was not clearly explained.
Conclusions:
Dural-arachnoidal enhancement in the brain after lumbar puncture is uncommon, if it occurs at all, and lumbar puncture as a cause of enhancement should be considered a rare diagnosis of exclusion.
Insights
Lumbar puncture rarely causes meningeal enhancement in the brain. This enhancement, if present, is typically due to other factors and should be considered a rare diagnosis of exclusion.
Area of Science:
- Neurology
- Radiology
- Neuroimaging
Background:
- Meningeal enhancement on brain MRI can be caused by various conditions.
- The potential for lumbar puncture to induce meningeal enhancement is debated.
Purpose of the Study:
- To investigate whether lumbar puncture (LP) alone can cause meningeal enhancement in brain Magnetic Resonance Imaging (MRI).
Main Methods:
- Prospective review of brain MRI examinations within one month post-lumbar puncture.
- Retrospective review of dural-arachnoidal enhancement cases over an 18-month period.
Main Results:
- In the prospective cohort (97 patients), only one case showed unexplained dural-arachnoidal enhancement post-LP.
- In the retrospective cohort (11 cases), only one enhancement was not clearly explained.
Conclusions:
- Dural-arachnoidal enhancement following lumbar puncture is an infrequent occurrence.
- Lumbar puncture as a cause of meningeal enhancement is a rare diagnosis of exclusion.