Injuries: antemortem versus postmortem burns: practice question

A Forensic Medicine question in the style of the NEET PG paper. Answer it first, then read why the right option is right and why each of the others is wrong.

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Forensic Medicine · Injuries: antemortem versus postmortem burns

Sample item

A blister on a burnt body shows a surrounding red, inflamed zone, a reddened base and protein-rich fluid. What does this indicate?

AThe burn was inflicted after death, since blisters form in dead tissueBThe burn was sustained during life, as the inflammatory reaction shows a vital responseCThe finding has no value in separating antemortem from postmortem burnsDThe blister is from putrefaction and is unrelated to the burn

Original practice item, not a recalled exam question. Nothing here is recorded.

The answer and the reasoning

B. The burn was sustained during life, as the inflammatory reaction shows a vital response

A vesicle with a hyperaemic zone around it and a red, inflamed base signifies a vital reaction and so an antemortem burn. Postmortem blisters can form with heat but have a dry, pale or yellowish base and no red areola, since there is no circulation. This distinction is useful in suspected cases of burning after death.

Option by option

A. The burn was inflicted after death, since blisters form in dead tissue
Postmortem blisters can form but lack a red areola and a reddened base.
B. The burn was sustained during life, as the inflammatory reaction shows a vital response (correct)
Correct. A red inflamed zone and base show circulation and a vital reaction.
C. The finding has no value in separating antemortem from postmortem burns
The vital reaction is a recognised criterion for separating antemortem from postmortem burns.
D. The blister is from putrefaction and is unrelated to the burn
Putrefaction blisters are filled with foul fluid and gas and lack an inflammatory zone around them.

Source note: Original NextPrep sample item — pending expert review. This item is original practice material awaiting independent expert review, so confirm important facts in a standard textbook.

Questions about this Forensic Medicine question

What is the answer to this Forensic Medicine question?

The best answer is B, The burn was sustained during life, as the inflammatory reaction shows a vital response. A vesicle with a hyperaemic zone around it and a red, inflamed base signifies a vital reaction and so an antemortem burn.

Why is "The burn was inflicted after death, since blisters form in dead tissue" not the answer?

Postmortem blisters can form but lack a red areola and a reddened base.

Why is "The finding has no value in separating antemortem from postmortem bur…" not the answer?

The vital reaction is a recognised criterion for separating antemortem from postmortem burns.

Why is "The blister is from putrefaction and is unrelated to the burn" not the answer?

Putrefaction blisters are filled with foul fluid and gas and lack an inflammatory zone around them.

What concept does this question test?

It tests Injuries: antemortem versus postmortem burns in Forensic Medicine. Postmortem blisters can form with heat but have a dry, pale or yellowish base and no red areola, since there is no circulation. This distinction is useful in suspected cases of burning after death.

How hard is this question?

We tag it as an application question: it asks you to use a fact on a patient or a finding. The tag is our own editorial judgement, not an official difficulty rating, so read the reason for every option, not only the answer.

How should I study Injuries: antemortem versus postmortem burns?

Learn postmortem changes with their timelines, and toxicology as poison, sign, test and antidote. Then use the flashcards and the other Forensic Medicine questions on this site to test what stuck.

Is this a real NEET PG question?

No. It is an original practice item (editorial status: sample, version 1). NextPrep does not publish recalled or leaked questions, and independent faculty review of this item has not been completed yet, so confirm important facts in a standard textbook.