A case of diffuse axonal injury in violent death

Area of Science:

• Neuropathology
• Forensic Medicine

Background:

• Diffuse Axonal Injury (DAI) is a common traumatic brain injury resulting from acceleration-deceleration forces.
• Diagnosis of DAI can be challenging, especially in cases without obvious external trauma.

Observation:

• A 59-year-old man presented with severe facial swelling and edema following an assault.
• Autopsy revealed widespread subscalp bleeding and cerebral edema, but no skull fracture or intracranial hemorrhage.
• Microscopic examination showed characteristic axonal swelling and damage in the corpus callosum and brainstem, indicative of DAI.

Findings:

• Histochemical staining confirmed Diffuse Axonal Injury (DAI) as the cause of death.
• No beta-amyloid staining was observed, ruling out Alzheimer's disease pathology.
• The study highlights the importance of advanced staining techniques in diagnosing neuronal degenerative disorders.

Implications:

• This case underscores the potential for severe brain injury, including DAI, from non-penetrating head trauma.
• Accurate diagnosis of DAI is crucial for determining cause of death in forensic investigations.
• The findings emphasize the utility of various staining methods in identifying subtle neuropathological changes.