Postmortem diagnosis of hypothermia.

Area of Science:

• Forensic Pathology
• Toxicology
• Biochemistry

Background:

• Identifying hypothermia as a cause of death presents challenges in forensic pathology due to inconsistent and often absent macroscopic and microscopic indicators.
• While certain findings like frost erythema and Wischnewski spots support hypothermia, their absence does not exclude it.
• Ethanol intoxication complicates diagnosis by masking cold adaptation responses.

Purpose of the Study:

• To review the significance of diverse postmortem investigations in identifying fatal hypothermia.
• To highlight the diagnostic challenges and evolving methodologies in hypothermia fatalities.

Main Methods:

• Literature review of postmortem investigations for hypothermia.
• Analysis of macroscopic, microscopic, biochemical, immunohistochemical, imaging, and molecular pathology findings.
• Consideration of confounding factors such as ethanol intoxication.

Main Results:

• Specific macroscopic and microscopic findings are supportive but not definitive for fatal hypothermia.
• Postmortem biochemical analyses can reveal cold stress responses, but ethanol interferes with these indicators.
• Advanced techniques like immunohistochemistry and molecular pathology show promise but lack pathognomonic signs.

Conclusions:

• No single postmortem investigation currently provides pathognomonic signs of fatal hypothermia.
• A combination of traditional and advanced postmortem techniques, alongside careful consideration of toxicology, is crucial for accurate diagnosis.
• Further research into novel biomarkers and methodologies is needed to enhance the identification of hypothermia fatalities.