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[A study of acute subdural hematoma developing into hematoma with capsule formation]
Y Okumura1, T Shimomura, Y S Park
1Department of Neurosurgery, Seikeikai Hospital.
No Shinkei Geka. Neurological Surgery
|September 23, 1998
Summary
Some acute subdural hematomas (ASDH) can progress to chronic subdural hematomas (CSDH). Predictors include old age, brain atrophy history, and specific CT findings like expansive lesions and cerebrospinal fluid mixing.
Area of Science:
- Neurosurgery
- Radiology
- Neurology
Background:
- Conservative treatment for mild acute subdural hematoma (ASDH) is common.
- However, some ASDH cases do not resolve and progress to chronic subdural hematoma (CSDH).
- Identifying early predictors of this progression is crucial for timely intervention.
Observation:
- This study analyzed 96 mild, conservatively treated ASDH cases over 13 years.
- Ten cases (10.4%) progressed to CSDH.
- Progression occurred at a mean of 20.5 days post-lesion onset.
Findings:
- Patients progressing to CSDH were older (mean age 63.1 years) and included more males (70%).
- Pre-existing conditions like alcohol consumption, cerebral infarction, cerebral hemorrhage, and VP shunt were noted.
- Acute-phase CT scans revealed expansive lesions with low-density areas, interhemispheric fissure extension, and signs of cerebrospinal fluid mixing in all progressing cases.
Implications:
- Older age and a history of brain atrophy increase the risk of ASDH progression to CSDH.
- Specific acute-phase CT findings, such as expansive lesions and cerebrospinal fluid mixing, are key indicators.
- Early identification of these risk factors can guide treatment decisions and potentially prevent the need for more invasive procedures.