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Difference in Upper Limb Length Measurements Between Different Methods at External Postmortem Examination:

Gurnoor Bhatia¹, Jack Garland^1,2, Benjamin Ondruschka³

¹Griffith University School of Medicine and Dentistry, Southport.

The American Journal of Forensic Medicine and Pathology

|December 22, 2025

Summary

This summary is machine-generated.

Accurate upper limb length measurement in forensic cases requires consistent methodology. Using the same bony landmarks is crucial to avoid significant length discrepancies, especially during postmortem examinations.

Keywords:

arm length autopsy forensic pathology gunshot wounds rigor mortis

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Area of Science:

Forensic pathology
Anatomical measurement

Background:

Upper limb length measurement is common in forensic investigations, particularly for gunshot-related deaths.
Postmortem examinations often involve measuring limbs in a flexed state due to rigor mortis, raising questions about measurement accuracy.

Purpose of the Study:

To compare upper limb lengths measured in a flexed (rigor mortis) state versus an extended, anatomically positioned state.
To determine if measurement technique (landmark consistency) affects observed length differences.

Main Methods:

A prospective study involving 30 adult cadavers.
Measurements were taken with limbs in rigor mortis (flexed) and after rigor mortis was broken (extended, anatomical position).
Two measurement techniques were used: one without consistent bony landmarks and one adhering to specific landmarks (acromioclavicular joint, lateral epicondyle, wrist, distal phalanges).

Main Results:

When not using consistent bony landmarks, limb length was significantly shorter (mean 5 cm, max 13 cm) in the extended position.
When using consistent bony landmarks, no significant difference in limb length was observed (mean <0.5 cm, max 3 cm).

Conclusions:

Consistent measurement through defined bony landmarks is essential for accurate upper limb length determination in postmortem examinations.
Deviations from standard anatomical positioning and inconsistent landmark use can lead to erroneous length interpretations in forensic contexts.