Postmortem Methanol and Formic Acid Levels and Their Pathological Correlates: Diagnostic Implications from an Autopsy...

Area of Science:

• Forensic Toxicology
• Pathology
• Biochemistry

Background:

• Methanol poisoning is a significant global cause of fatal toxic exposures.
• The diagnostic utility of postmortem methanol and formic acid levels, particularly concerning organ-specific pathology, requires further clarification.

Purpose of the Study:

• To conduct a comprehensive forensic and diagnostic evaluation of fatal methanol intoxications.
• To correlate biochemical markers with histopathological findings in major organs.

Main Methods:

• Retrospective analysis of 138 autopsy-confirmed methanol poisoning cases.
• Quantitative measurement of methanol and formic acid in blood and vitreous humor.
• Systematic review of autopsy reports, demographics, and histopathology, noting co-ingestions.

Main Results:

• Average blood methanol: 142.47 mg/dL; formic acid: 258.62 mg/dL.
• Common findings: cerebral edema, putaminal necrosis, myocardial ischemia, hepatic steatosis, pulmonary edema, pancreatitis.
• Combined biochemical and pathological analysis improved differentiation of methanol injury patterns.

Conclusions:

• Methanol intoxication presents distinct biochemical and pathological profiles.
• Integrating toxicological markers with organ pathology enhances diagnostic accuracy in postmortem evaluations.
• This approach supports more reliable identification of methanol-related fatalities.