Occult cerebrovascular malformations: follow-up with MR imaging
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R Sigal1, O Krief, J P Houtteville
1Department of Neuroradiology/CIERM, Bicêtre Hospital, Le Kremlin Bicêtre, France.
Abstract:
The clinical and magnetic resonance (MR) imaging findings in 20 patients with MR evidence of occult cerebrovascular malformations (OCVMs) were retrospectively analyzed. Of 27 lesions followed up throughout a mean period of 18 months, eight showed obvious evolution on MR images (four cases of regression and four cases of new bleeding). Three new independent lesions were disclosed. Clinical evolution was discordant with MR findings in five patients. In the other patients, topography of the lesion, mass effect, and location of the hemorrhage could explain clinical data. The dynamic nature of OCVMs must be considered in decisions on therapeutic management.
Insights
Occult cerebrovascular malformations (OCVMs) show dynamic changes on MR imaging, including regression and new bleeding. These imaging findings are crucial for guiding therapeutic management decisions.
Area of Science:
- Neurology
- Radiology
- Neurosurgery
Background:
- Occult cerebrovascular malformations (OCVMs) are challenging to diagnose.
- Understanding the natural history of OCVMs is vital for patient care.
Purpose of the Study:
- To analyze clinical and MR imaging findings in patients with OCVMs.
- To evaluate the evolution of OCVMs over time.
- To correlate imaging findings with clinical presentation.
Main Methods:
- Retrospective analysis of 20 patients with MR evidence of OCVMs.
- Follow-up of 27 lesions over a mean period of 18 months.
- Review of clinical data and MR imaging characteristics.
Main Results:
- Eight of 27 lesions showed significant evolution (four regression, four new bleeding).
- Three new independent lesions were identified.
- Clinical evolution was discordant with MR findings in five patients.
Conclusions:
- OCVMs exhibit a dynamic nature with potential for regression or new bleeding.
- MR imaging is essential for monitoring OCVMs and informing treatment strategies.
- The dynamic behavior of OCVMs necessitates careful consideration in therapeutic decision-making.