ABFM Principles of Forensic Pathology 3

Question 1

During autopsy of a decomposed body, which specimen is most reliable for estimating blood alcohol concentration when blood is unavailable?

Accepted Answer

Vitreous humor

Answer

Vitreous humor is sequestered from the circulation and is resistant to putrefactive change, making it the most reliable alternative fluid for post-mortem toxicology.

Question 2

A victim is found with a gunshot wound to the right temple. The wound shows a muzzle contusion ring, soot, and stippling. What is the most likely range of fire?

Accepted Answer

Close-range contact or near-contact

Answer

The combination of a muzzle contusion ring, soot deposition, and stippling (powder tattooing) indicates a near-contact or close-range discharge, where soot and unburned powder contact the skin.

Question 3

Which injury pattern is pathognomonic for shaken baby syndrome (abusive head trauma) in an infant?

Accepted Answer

Subdural hematoma with diffuse axonal injury and retinal hemorrhages

Answer

The classic triad of subdural hematoma, diffuse axonal injury, and retinal hemorrhages is characteristic of severe rotational acceleration-deceleration forces in abusive head trauma.

Question 4

What does 'cadaveric spasm' (instantaneous rigor) indicate in forensic investigation?

Accepted Answer

Intense muscular activity or emotional state immediately before death

Answer

Cadaveric spasm is an instantaneous, permanent muscular contraction at the moment of death associated with extreme physical or emotional exertion, sometimes preserving objects gripped at death.

Question 5

In cases of suspected carbon monoxide poisoning, what characteristic autopsy finding is expected?

Accepted Answer

Cherry-red discoloration of skin, blood, and organs

Answer

Carboxyhemoglobin imparts a bright cherry-red color to blood, skin, and internal organs, which is a hallmark of carbon monoxide poisoning at autopsy.

(ABFM) American Board of Forensic Medicine Certification Practice Test

(ABFM) American Board of Forensic Medicine Certification Practice Test

ABFM Principles of Forensic Pathology 3