Medicolegal Autopsies Practice Questions

Q: In how many flaps is the fetal skull opened during an autopsy?

4. ### Explanation **Correct Answer: C. 4** In fetal and neonatal autopsies, the skull is opened using the **"Beneke’s Technique"** (also known as the "Window Technique"). Unlike the adult skull, which is opened by a circular saw cut to remove the calvarium, the fetal skull is soft and the sutures are not fused. To preserve the integrity of the sagittal sinus and the falx cerebri, four flaps are created. This is done by making longitudinal incisions parallel to the sagittal suture (on both sides) and connecting them with transverse incisions. These four bone flaps (two frontal and two parietal) are then reflected outward like the petals of a flower. This allows the pathologist to inspect the **tentorium cerebelli** and **falx cerebri** for tears or intracranial hemorrhages, which are critical indicators of birth trauma. **Analysis of Incorrect Options:** * **Option A (2):** A two-flap approach would involve reflecting only the scalp or a single hemisphere's bone, which provides insufficient exposure to the midline structures. * **Option B (3):** Three flaps do not align with the anatomical symmetry of the fetal skull (paired frontal and parietal bones) and would risk damaging the superior sagittal sinus. * **Option D (5):** Five flaps are unnecessary and would cause excessive fragmentation of the delicate skull, making reconstruction difficult. **High-Yield Facts for NEET-PG:** * **Beneke’s Technique:** The gold standard for fetal skull autopsy to detect **Tentorial Tears**. * **Maceration vs. Putrefaction:** If a fetus dies in utero (Stillbirth), look for signs of maceration (aseptic autolysis). If the skull bones are overlapping, it is known as **Spalding’s Sign** (radiological) or **Deuel’s Halo Sign**. * **Hydrostatic Test:** Used to determine if the fetus was born alive (lungs float in water). However, it can be false positive if decomposition gases are present or if artificial respiration was attempted.

Q: Wischnewski ulcers are characteristic of which condition?

Gastric ulcers in hypothermia. **Explanation:** **Wischnewski ulcers** (also known as Wischnewski spots) are a classic post-mortem finding in deaths due to **hypothermia**. These are multiple, small (1–5 mm), dark-brown to black erosions found on the **gastric mucosa**. They are caused by autolysis and the conversion of hemoglobin into acid hematin due to gastric acid, following localized mucosal hemorrhages. * **Why Option A is correct:** Wischnewski ulcers are found in approximately 75–90% of fatal hypothermia cases. They are typically located on the crests of the gastric folds and are considered a hallmark sign of cold exposure. * **Why Options B & D are incorrect:** Ulcers associated with severe burns are known as **Curling’s ulcers**. These are acute stress ulcers that typically occur in the duodenum (though they can occur in the stomach). * **Why Option C is incorrect:** Wischnewski ulcers are specifically **gastric** lesions; they are rarely, if ever, found in the duodenum. **High-Yield Clinical Pearls for NEET-PG:** * **Location:** Stomach (Gastric mucosa), never the esophagus or duodenum. * **Appearance:** "Leopard skin" appearance of the gastric mucosa. * **Other Hypothermia Findings:** * **Paradoxical Undressing:** The victim removes clothes despite the cold due to a false sensation of heat. * **Hide-and-Die Syndrome:** Terminal burrowing behavior. * **Pinkish Lividity:** Bright pink post-mortem staining (due to oxyhemoglobin). * **Keely’s Sign:** Hemorrhage into the iliopsoas muscle. * **Frost Erythema:** Red patches over large joints (knees/elbows).

Q: Post-mortem purge is associated with which of the following?

Putrefaction. **Explanation:** **Post-mortem purge** refers to the leakage of foul-smelling, reddish-brown frothy fluid from the mouth, nostrils, and sometimes other orifices (rectum/vagina) after death. **Why Putrefaction is the Correct Answer:** Putrefaction is the stage of decomposition characterized by the action of anaerobic bacteria (primarily *C. welchii*). These bacteria produce significant amounts of gases (hydrogen sulfide, methane, ammonia) within the body cavities. As the intra-abdominal and intra-thoracic pressure increases due to gas accumulation, it compresses the internal organs. This pressure forces decomposed blood and liquefied tissues out through the natural orifices, manifesting as **purge**. This phenomenon is often mistaken for ante-mortem bleeding or foul play. **Why Other Options are Incorrect:** * **Hypostasis & Post-mortem Lividity (Options A & C):** These terms are synonymous. They refer to the gravitational settling of blood in the dependent parts of the body. While they involve blood movement, they do not involve the gas-driven expulsion of fluids seen in purge. * **Rigor Mortis (Option B):** This is the post-mortem stiffening of muscles due to the depletion of ATP. It is a physical change in muscle proteins and is unrelated to the decompositional gases that cause purging. **High-Yield NEET-PG Pearls:** * **Differential Diagnosis:** Purge fluid can be distinguished from **haemoptysis** (bright red/frothy) or **haematemesis** (coffee ground/acidic) by its foul putrid odor and the presence of decomposition signs. * **Timeline:** Purge typically appears during the "bloated stage" of putrefaction (usually 36–48 hours in tropical climates). * **Casper’s Dictum:** Decomposition occurs twice as fast in water and eight times as fast in air compared to burial in earth (Ratio 1:2:8).

Q: Putrefaction of a dead body buried in dry soil as compared to air is:

Slower. ### Explanation The correct answer is **Slower (Option C)**. This question is based on **Casper’s Dictum** (also known as Casper’s Law), which describes the relative rate of putrefaction in different media. According to this rule, the rate of decomposition is approximately: * **1 week in Air = 2 weeks in Water = 8 weeks in Earth (Burial).** **Why the correct answer is right:** Putrefaction is primarily driven by bacterial action and autolysis. Burial in soil, especially **dry soil**, slows down this process due to several factors: 1. **Temperature:** Soil acts as an insulator; the deeper the grave, the cooler and more constant the temperature, which inhibits bacterial growth. 2. **Oxygen Availability:** Burial limits the supply of oxygen required by aerobic bacteria, which are essential for the early stages of decomposition. 3. **Protection:** Soil protects the body from scavengers and insects (like blowflies) that significantly accelerate tissue destruction in open air. **Why incorrect options are wrong:** * **A & B (Same rate/Quicker):** These are incorrect because air provides optimal oxygen and exposure to environmental heat and insects, making decomposition in air roughly **8 times faster** than in a buried state. * **D (Variable):** While environmental factors always play a role, the general rule under standard conditions is that burial significantly retards the process compared to air. **High-Yield Facts for NEET-PG:** * **Casper’s Law Ratio:** 1:2:8 (Air:Water:Earth). * **Deep vs. Shallow Graves:** Bodies in shallow graves decompose faster than those in deep graves due to higher warmth and easier access for insects. * **Dry vs. Moist Soil:** Putrefaction is slower in dry soil. In very dry, sandy soil, **mummification** may occur instead of putrefaction. * **Clothing:** Tight clothing can slightly delay putrefaction by protecting the skin from insects, whereas loose clothing may accelerate it by retaining body heat.

Q: What is the purpose of a post-mortem autopsy?

To examine the entire body. ### **Explanation** In Forensic Medicine, a **Medicolegal Autopsy (MLM)** is a mandatory, legally directed examination performed to determine the cause, manner, and time of death. **1. Why Option A is Correct:** The fundamental principle of a medicolegal autopsy is that it must be **complete and systematic**. Even if the cause of death seems obvious (e.g., a gunshot wound to the chest), the pathologist must examine all three major body cavities—**Cranial, Thoracic, and Abdominal**—along with all internal organs. This is necessary to rule out contributory factors, pre-existing diseases, or secondary injuries that might be legally significant. **2. Why Other Options are Incorrect:** * **Option B & C:** Limiting the exam to only "injured parts" or "requested parts" is legally and medically unacceptable. A partial autopsy may miss hidden internal hemorrhages, natural diseases (like an MI preceding a fall), or toxicological evidence, leading to a "Negative Autopsy" or a miscarriage of justice. * **Option D:** Unlike a **Clinical/Pathological Autopsy** (performed to study disease processes), a **Medicolegal Autopsy** does not require consent from relatives. It is performed under the authority of a legal official (Police or Magistrate). Relatives cannot restrict the scope of a forensic examination. ### **High-Yield Clinical Pearls for NEET-PG:** * **The "Three-Cavity Rule":** A medicolegal autopsy is never complete unless the brain, lungs/heart, and abdominal viscera are all examined. * **Inquest:** In India, autopsies are conducted following an inquest under **Section 174 CrPC** (Police Inquest) or **Section 176 CrPC** (Magistrate Inquest). * **Negative Autopsy:** Occurs when no cause of death is found even after a meticulous gross and microscopic examination (approx. 2-5% of cases). * **Obscure Autopsy:** When findings are present but so minimal or vague that they fail to explain the death clearly.

Question 1

In how many flaps is the fetal skull opened during an autopsy?

Accepted Answer

4

Answer

2

Answer

3

Answer

5

Question 2

What is an inconclusive autopsy known as?

Accepted Answer

No cause of death is found on gross as well as histopathological examination.

Answer

Cause is apparent on gross examination but not on histopathological examination.

Answer

Gross findings are minimal.

Answer

Cause is apparent on gross examination but not found due to constraints on the part of the doctor.

Question 3

Wischnewski ulcers are characteristic of which condition?

Accepted Answer

Gastric ulcers in hypothermia

Answer

Gastric ulcers in burns

Answer

Duodenal ulcers in hypothermia

Answer

Duodenal ulcers in burns

Question 4

Which of the following is not a cause of "obscure autopsy"?

Accepted Answer

Cardiac Tamponade

Answer

Epilepsy

Answer

Reflex Vagal Inhibition

Answer

Anaphylaxis

Question 5

Post-mortem purge is associated with which of the following?

Accepted Answer

Putrefaction

Answer

Hypostasis

Answer

Rigor mortis

Answer

Post-mortem lividity

Question 6

What effect does a deep inspiration above the water level have on the flotation of the body?

Accepted Answer

No effect on flotation of the body

Answer

Early flotation of the body

Answer

Late flotation of the body

Answer

Late flotation of the body only in sea water

Question 7

Foamy liver is seen in which of the following conditions?

Accepted Answer

2-3 days after death due to putrefaction

Answer

Chronic venous congestion

Answer

Aseptic autolysis of a dead-born fetus

Answer

Seen immediately after death in cyanide poisoning

Question 8

Putrefaction of a dead body buried in dry soil as compared to air is:

Accepted Answer

Slower

Answer

Same rate

Answer

Quicker

Answer

Variable

Question 9

For exhumation permission, from whom should approval be taken?

Accepted Answer

Executive magistrate

Answer

Sub-divisional magistrate

Answer

Special magistrate

Answer

Juvenile magistrate

Question 10

What is the purpose of a post-mortem autopsy?

Accepted Answer

To examine the entire body

Answer

To examine only injured parts

Answer

To examine parts requested in an inquest

Answer

To examine parts for which relatives have given permission

Medicolegal Autopsies — MCQs

Medicolegal Autopsies — MCQs

On this page

Practice by Chapter

Want unlimited practice?