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[Asymptomatic cerebral hemorrhage detected by MRI]
Y Nakajima1, H Ohsuga, M Yamamoto
1Department of Neurology, Tokai University School of Medicine.
Rinsho Shinkeigaku = Clinical Neurology
|March 1, 1991
Summary
Asymptomatic cerebral hemorrhage, often undetected, occurs in 0.6% of MRI patients. This study details its incidence, causes, and characteristics in individuals without prior stroke symptoms.
Area of Science:
- Neurology
- Radiology
- Neuroimaging
Context:
- Silent cerebral infarction is common, but asymptomatic cerebral hemorrhage is less understood.
- Magnetic Resonance Imaging (MRI) enables detection of old asymptomatic hemorrhages.
- Few reports exist on the incidence and characteristics of asymptomatic cerebral hemorrhage.
Purpose:
- To determine the incidence, causes, and characteristics of asymptomatic cerebral hemorrhage detected via MRI.
- To investigate the prevalence of asymptomatic cerebral hemorrhage in patients undergoing brain MRI.
Summary:
- 17 patients (0.6% of MRI cohort) with no stroke symptoms had asymptomatic cerebral hemorrhage.
- 12 cases were primary intracranial hemorrhage (ICH), often hypertensive, presenting as slit-like lesions.
- 5 cases were secondary ICH, linked to arteriovenous malformations (AVM) and angiomas.
Impact:
- Highlights the higher-than-expected incidence of asymptomatic cerebral hemorrhage.
- Provides insights into the specific types and locations of these lesions.
- Underscores the diagnostic value of MRI in identifying previously unknown cerebrovascular events.