Human cerebral infarct: a proposed histopathologic classification based on 137 cases.

Area of Science:

• Neuropathology
• Histology
• Cerebrovascular Disease

Background:

• Human cerebral infarcts are common neurological events.
• Accurate dating of infarcts is crucial for clinical management and research.
• Microscopic evaluation is a primary method for characterizing brain tissue damage.

Purpose of the Study:

• To establish a histological classification system for human cerebral infarcts.
• To correlate microscopic features with lesion age.
• To identify key diagnostic criteria for different infarct stages.

Main Methods:

• Analysis of 137 human cerebral infarct cases.
• Hematoxylin and eosin staining of brain tissue sections.
• Microscopic examination to identify key histological variables and determine lesion age based on clinical data.

Main Results:

• A three-phase classification was proposed: acute neuronal injury (1-2 days), organization (acute inflammation 3-37 days; chronic inflammation 10 days-53 years), and resorption (26 days-23 years).
• Distinct histological features characterize each phase, including neuronal changes, inflammation patterns, and tissue remodeling.
• Neuronophagia was notably absent in all studied cerebral infarcts.

Conclusions:

• The proposed histological classification effectively stages human cerebral infarcts.
• Microscopic analysis provides reliable indicators for determining infarct age.
• Understanding these stages aids in the diagnosis and study of cerebrovascular diseases.