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Hemorrhagic Stroke l: Introduction01:17

Hemorrhagic Stroke l: Introduction

A hemorrhagic stroke is an acute neurological event that occurs when a weakened cerebral blood vessel ruptures, allowing blood to accumulate within or around the brain. The sudden release of blood forms a focal hematoma that increases intracranial pressure, displaces neural tissue, and can obstruct cerebrospinal fluid pathways. These effects may be compounded by intraventricular extension of the hemorrhage, cerebral edema, or compression of adjacent structures, all of which contribute to...
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A hemorrhagic stroke develops when a cerebral blood vessel ruptures, allowing blood to escape into the surrounding brain tissue, as in intracerebral hemorrhage (ICH), or into the subarachnoid space, as in subarachnoid hemorrhage (SAH). Because the skull is a rigid compartment, the sudden presence of extravascular blood rapidly increases intracranial pressure and compresses adjacent neural structures, leading to immediate tissue injury and impaired cerebral perfusion.Mass Effect and Primary...
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DefinitionTraumatic brain injury, or TBI, is a disturbance of normal brain function induced by an external mechanical force, such as a direct blow to the head or a penetrating injury. It can affect both brain structure and function, producing a wide range of clinical outcomes. TBI is a heterogeneous condition, meaning its effects may differ based on the type, location, and severity of the injury.Basis of ClassificationTBI is classified based on severity, injury mechanism, or pathophysiology. In...
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Advanced Diffusion Imaging in The Hippocampus of Rats with Mild Traumatic Brain Injury
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Traumatic Microbleeds in Mild Traumatic Brain Injury: Stability, Distribution, and Association with Other Injuries.

Antti Junkkari1, Antti Korvenoja2, Antti Huovinen1

  • 1Department of Neurology, Clinical Neurosciences, Helsinki University Hospital and University of Helsinki, Helsinki, Finland.

Journal of Neurotrauma
|October 31, 2025
PubMed
Summary
This summary is machine-generated.

Traumatic microbleeds (TMBs) in mild traumatic brain injury (mTBI) patients are detectable on MRI scans up to 3 months post-injury. Follow-up imaging confirms initial TMBs, indicating stable lesion detection over time.

Keywords:
Common Data Elements for NeuroimagingTMBmagnetic resonance imagingmild traumatic brain injuryprospective cohort studytraumatic microbleeds

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Area of Science:

  • Neurology
  • Radiology
  • Neurotrauma

Background:

  • Mild traumatic brain injury (mTBI) is a common neurological condition.
  • Traumatic microbleeds (TMBs) are indicative of injury severity.
  • Longitudinal changes in TMBs after mTBI require further investigation.

Purpose of the Study:

  • To assess the detectability and stability of traumatic microbleeds (TMBs) in adult patients with mild traumatic brain injury (mTBI) over a 3-month period.
  • To determine if TMBs change in number or location in different brain regions after 3 months.
  • To explore the association between TMBs and other intracranial abnormalities in mTBI.

Main Methods:

  • Adult patients diagnosed with mTBI underwent 3 Tesla MRI scans at baseline (3-17 days post-trauma) and at 3-month follow-up.
  • Traumatic microbleeds (TMBs) were identified, counted, and localized using Common Data Elements for Neuroimaging of Traumatic Brain Injury (CDE-TBI) criteria.
  • Statistical analysis was performed to compare baseline and follow-up findings and to assess associations with other injuries.

Main Results:

  • At baseline, 19% of 113 patients had TMBs; at 3 months, 24% of 88 patients had TMBs.
  • All 129 initially detected TMB lesions remained visible at the 3-month follow-up.
  • No new TMB lesions were detected at follow-up.
  • The frontal subcortical white matter was the most common location for TMBs (60%).
  • Patients with other intracranial abnormalities showed a higher prevalence of TMBs (40% vs. 17%).

Conclusions:

  • Initial traumatic microbleeds (TMBs) in mild traumatic brain injury (mTBI) patients are reliably detectable with conventional MRI up to 3 months post-injury.
  • Delayed imaging does not compromise the detection of TMBs.
  • The presence of other radiological abnormalities may indicate a greater injury burden in mTBI patients.