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Traumatic subdural hygroma: five cases with changed density and spontaneous resolution.
Marco Antonio Zanini1, Luiz Antonio de Lima Resende, Carlos Clayton Macedo de Freitas
1Services of Neurosurgery, Department of Neurology and Psychiatry, Botucatu School Medicine, State University of Sao Paulo, 18618-970 Botucatu, SP, Brazil. mzanini@fmb.unesp.br
Arquivos De Neuro-Psiquiatria
|April 11, 2007
Summary
Traumatic subdural hygromas can evolve, sometimes mimicking chronic subdural hematomas on imaging. However, these cases demonstrate a benign resolution, highlighting a different potential outcome for hygroma evolution.
Area of Science:
- Neuroimaging
- Neurosurgery
- Traumatic Brain Injury
Background:
- Subdural hygromas are collections of cerebrospinal fluid in the subdural space following trauma.
- Previous literature suggests evolving subdural hygromas may transform into chronic subdural hematomas.
- Understanding the natural history of subdural hygromas is crucial for accurate diagnosis and management.
Observation:
- Thirty-four adult patients with traumatic subdural hygroma were monitored using serial computed tomography (CT) and magnetic resonance imaging (MRI).
- Five patients exhibited increasing density on CT and MRI scans over 11 days to 6 months post-trauma.
- These imaging findings initially suggested a possible transformation into chronic subdural hematoma.
Findings:
- Despite initial imaging suggesting hematoma formation, these five patients showed complete spontaneous resolution.
- Clinical outcomes and final CT scans were benign in all cases with observed density changes.
- This indicates a distinct evolutionary pathway for some traumatic subdural hygromas.
Implications:
- The study identifies a potential for traumatic subdural hygromas to undergo density transformation without progressing to chronic subdural hematoma.
- This finding expands the understanding of hygroma evolution and imaging characteristics.
- It suggests that careful monitoring may be warranted, as spontaneous resolution is a possible outcome.
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