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Diffuse axonal injury by assault.

T Imajo1, R C Challener, U Roessmann

  • 1Cuyahoga County Coroner's Office, Cleveland, Ohio.

The American Journal of Forensic Medicine and Pathology
|September 1, 1987
PubMed
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Diffuse axonal injury (DAI), often caused by head acceleration, is a critical brain injury. Prompt identification of DAI lesions, including axonal damage, is vital for understanding head trauma cases.

Area of Science:

  • Neurology
  • Traumatic Brain Injury (TBI)

Background:

  • Diffuse axonal injury (DAI) is a common and severe form of traumatic brain injury (TBI).
  • Most DAI cases result from traffic accidents or falls, caused by angular or rotational head acceleration.
  • DAI is the second leading cause of head injury mortality, following subdural hematoma.

Observation:

  • This report details a case of DAI resulting from physical assault.
  • Clinical presentation typically includes immediate and prolonged coma or a persistent vegetative state.
  • Histological changes in DAI can be subtle, necessitating a deliberate search for the injury.

Findings:

  • The characteristic triad of DAI includes focal lesions (hemorrhages/lacerations) in the corpus callosum and brainstem.
  • Microscopic examination reveals axonal damage, specifically "retraction balls."

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  • This case highlights DAI as a consequence of assault, broadening its known etiological spectrum.

    • Implications:

    • Understanding DAI is crucial for diagnosing and managing severe head trauma.
    • Increased awareness of DAI's subtle signs can improve diagnostic accuracy.
    • Further research into DAI mechanisms and identification is warranted for better patient outcomes.