Forensic Pathology of Burns
Forensic Medicine: Thermal Injury Essentials
1. Clinical Classification (Degree)
| Degree | Description |
|---|---|
| First | Epidermis only; erythema, painful (sunburn). |
| Second | Epidermis and part of dermis; blistering (vesiculation), painful. |
| Third | Full-thickness (entire dermis); charred or leathery, painless (nerve destruction). |
| Fourth | Involvement of muscle, fascia, or bone (charring). |
2. Vital Reactions (Ante-Mortem vs. Post-Mortem)
Distinguishing whether burns occurred while the victim was alive is crucial in death investigation:
- Ante-Mortem: Presence of a red line of hyperemia (vital reaction), inflammatory cell infiltration, elevated carboxyhemoglobin (COHb) levels in blood, and soot particles in the larynx/trachea (indicating respiration during fire).
- Post-Mortem: Absence of vital reaction; skin remains pale/yellowish with no inflammatory infiltrate.
3. High-Yield Forensic Pearls
- Pugilistic Attitude: The “boxer” pose of a burned body—flexion of limbs due to heat-induced muscle protein coagulation and contraction (not an attempt to defend).
- Burn vs. Scald: Scalds (moist heat) typically show no singeing of hair, lack of charring, and distinct margins, whereas flames (dry heat) cause charring and singed hair.
- Heat Hematoma: A collection of chocolate-colored, friable blood between the skull and dura caused by heat; it must be distinguished from an ante-mortem epidural hematoma.