[Diagnosis of early phase diffuse axonal injury using immunohistochemical methods]

Area of Science:

• Neuropathology
• Neuroscience
• Forensic Pathology

Context:

• Diffuse axonal injury (DAI) is a common consequence of severe head trauma.
• Accurate diagnosis of DAI is critical for patient management and legal proceedings.
• Traditional histological methods can be insufficient for early DAI detection.

Purpose:

• To investigate the utility of immunohistochemical markers for diagnosing diffuse axonal injury (DAI).
• To establish the earliest time point for DAI diagnosis using specific biomarkers.
• To differentiate traumatic axonal changes from artifactual lesions.

Summary:

• Histologic and immunohistochemical analysis of 12 craniocerebral injury cases revealed DAI in 58%.
• Ubiquitin, neurofilaments, beta-amyloid precursor protein, and neuron-specific enolase identified traumatic axonal changes.
• Early DAI diagnosis (as early as 2 hours post-injury) was achieved via immunohistochemistry, especially neuron-specific enolase, distinguishing it from axonal edema in controls.

Impact:

• Immunohistochemistry, particularly neuron-specific enolase, is vital for diagnosing early-phase DAI.
• This method aids in distinguishing traumatic axonal deformities from artificial lesions.
• Improved diagnostic accuracy for DAI can enhance understanding of traumatic brain injury pathophysiology.