Medicolegal Autopsies — MCQs

A 70-year-old woman dies in a nursing home after a heart attack. The time of onset of her clinical symptomatology and the cause of death are uncertain, and the possibility of neglect is being considered. Therefore, an autopsy investigation is arranged. The forensic pathologist discovers acute thrombosis involving the posterior descending branch of the right coronary artery with resultant myocardial infarction (MI) in the posterior third of the interventricular septum. Histologically, there is coagulation necrosis with associated abundant neutrophilic infiltration. Histiocytes and lymphocytes are scanty. Which of the following is the approximate period between the onset of ischemic injury and death?

Q113Easy

Postmortem caloricity is seen in which of the following conditions?

Q114Easy

Which of the following is NOT considered a postmortem decomposition change?

Q115Easy

Cadaveric spasm is defined as which of the following?

Q116Easy

Cardiac polyp is seen in which of the following conditions?

Q117Medium

Which is the surest sign of brain stem death?

Q118Easy

After a postmortem examination, to whom is the body handed over?

Q119Easy

In embalming, through which vessels is the solution typically administered?

Q120Easy

For exhumation, the order should be passed by which authority?

Medicolegal Autopsies Indian Medical PG Practice Questions and MCQs

Question 111: What is the last organ to be dissected during autopsy in cases of asphyxial death?

A. Neck (Correct Answer)
B. Head
C. Abdomen
D. Thorax

Explanation: ### Explanation In cases of suspected **asphyxial death** (such as hanging, strangulation, or throttling), the **neck** is always the last organ to be dissected. This is a fundamental rule in forensic pathology known as the **"Bloodless Field" technique**. **Why the Neck is Dissected Last:** The primary goal is to avoid **artifactual hemorrhages** (specifically the *Browardel’s spots* or false bruising). If the neck is opened while the head and thorax are still intact, the blood pressure within the cervical vessels remains high. Cutting into the neck under these conditions causes blood to seep into the tissues, mimicking antemortem bruising and leading to a false diagnosis of manual strangulation. By dissecting the **cranium (head)** and **trunk (thorax/abdomen)** first, the major vessels are drained, creating a "bloodless field" in the neck. This ensures that any hemorrhage found during the subsequent neck dissection is truly antemortem and indicative of mechanical pressure. **Analysis of Incorrect Options:** * **B. Head:** The head is usually opened early to drain the cerebral sinuses and reduce venous pressure. * **C & D. Abdomen and Thorax:** These are dissected before the neck to drain the inferior and superior vena cava, effectively emptying the venous reservoirs of the neck. **NEET-PG High-Yield Pearls:** * **Prinsloo and Gordon Artifact:** Post-mortem hemorrhages in the neck tissues caused by rough handling or improper dissection technique. * **Order of Dissection:** In routine cases, the order is usually Cranium → Thorax → Abdomen. However, in asphyxia, the order is **Cranium + Thorax + Abdomen → Neck**. * **Hyoid Bone:** In hanging, the hyoid bone fracture is rare (mostly in older victims); in throttling, it is very common. Dissecting the neck last preserves the integrity of these delicate structures for accurate assessment.

Question 112: A 70-year-old woman dies in a nursing home after a heart attack. The time of onset of her clinical symptomatology and the cause of death are uncertain, and the possibility of neglect is being considered. Therefore, an autopsy investigation is arranged. The forensic pathologist discovers acute thrombosis involving the posterior descending branch of the right coronary artery with resultant myocardial infarction (MI) in the posterior third of the interventricular septum. Histologically, there is coagulation necrosis with associated abundant neutrophilic infiltration. Histiocytes and lymphocytes are scanty. Which of the following is the approximate period between the onset of ischemic injury and death?

A. 1 hour
B. 12 hours
C. 2 days (Correct Answer)
D. 5 days

Explanation: **Explanation:** The correct answer is **2 days (Option C)**. This question tests the high-yield timeline of histopathological changes following a Myocardial Infarction (MI). **1. Why Option C is correct:** The presence of **coagulation necrosis** accompanied by **abundant neutrophilic infiltration** is the hallmark of the **24–72 hour (1–3 days)** window post-MI. Neutrophils reach their peak concentration around day 2 to day 3 as they respond to the acute inflammatory signals triggered by cell death. Since the question describes "abundant" neutrophils but "scanty" histiocytes/lymphocytes, the 2-day mark is the most accurate histological fit. **2. Why other options are incorrect:** * **Option A (1 hour):** No gross or light microscopic changes are visible within the first hour. The earliest microscopic change (wavy fibers) typically appears after 1–3 hours. * **Option B (12 hours):** Between 4–12 hours, coagulation necrosis begins, and "mottling" may be seen grossly, but significant neutrophilic infiltration has not yet occurred. * **Option D (5 days):** By day 5–7, neutrophils are undergoing apoptosis and disappearing. They are replaced by an influx of **macrophages (histiocytes)** and lymphocytes to begin phagocytosis of necrotic debris. Granulation tissue also starts forming at the margins. **High-Yield Clinical Pearls for NEET-PG:** * **0–6 hours:** No significant light microscopy changes (Electron microscopy shows mitochondrial swelling). * **12–24 hours:** Contraction bands, eosinophilia, and early neutrophilic infiltrate. * **1–3 days:** Peak neutrophils (Yellow-tan infarct center grossly). * **3–7 days:** Macrophage infiltration begins (Hyperemic border grossly). * **7–10 days:** Maximum risk of **myocardial rupture** (due to softened necrotic tissue/weakest point). * **>2 months:** Dense collagenous scar formation is complete.

Question 113: Postmortem caloricity is seen in which of the following conditions?

A. Tetanus
B. Cholera
C. Strychnine poisoning
D. All of the above (Correct Answer)

Explanation: **Explanation:** **Postmortem Caloricity** refers to a paradoxical rise in body temperature for the first 1–2 hours after death, instead of the typical cooling (Algor mortis). This occurs when the rate of heat production in the body exceeds the rate of heat loss at the time of death. **Underlying Medical Concept:** The phenomenon is driven by two primary mechanisms: 1. **Increased Thermogenesis:** Excessive muscular activity or high metabolic rates just before death. 2. **Failure of Heat Loss:** Impairment of the body’s thermoregulatory center (hypothalamus) or high environmental humidity. **Analysis of Options:** * **A. Tetanus:** Causes intense, sustained muscular contractions (spasms). This extreme muscular activity generates significant metabolic heat that continues briefly after somatic death. * **B. Cholera:** Intense dehydration and increased bacterial activity/toxemia lead to a rise in core temperature. Additionally, the suppression of evaporation (due to circulatory collapse) hinders heat loss. * **C. Strychnine Poisoning:** Similar to Tetanus, Strychnine causes violent convulsions and muscular rigidity, leading to excessive heat production. Since all three conditions involve mechanisms that trigger a postmortem temperature rise, **Option D (All of the above)** is correct. **High-Yield Clinical Pearls for NEET-PG:** * **Other causes of Postmortem Caloricity:** Septicemia, Heat stroke (Sunstroke), Pontine hemorrhage (due to hyperpyrexia), and Peritonitis. * **Algor Mortis:** The standard cooling of the body. The average rate is **0.4 to 0.7°C per hour**. * **Glaister’s Formula:** Used to estimate the time since death based on body temperature: $\text{Time since death} = \frac{\text{Normal body temp} - \text{Rectal temp}}{1.5}$.

Question 114: Which of the following is NOT considered a postmortem decomposition change?

A. Discoloration
B. Discharge
C. Degloving
D. Dilatation (Correct Answer)

Explanation: **Explanation:** Postmortem decomposition is a complex process involving **autolysis** (self-digestion by enzymes) and **putrefaction** (bacterial action). **Why Dilatation is the Correct Answer:** **Dilatation** (specifically of the pupils) is a sign of **Somatic Death**, not a decomposition change. Immediately after death, the muscles of the iris relax, leading to a mid-dilated state. This occurs during the stage of primary flaccidity. In contrast, decomposition changes are part of **Molecular Death**, occurring hours to days later. **Analysis of Incorrect Options:** * **Discoloration:** This is the first sign of putrefaction. A greenish discoloration appears over the right iliac fossa (due to the formation of sulphmethaemoglobin in the caecum) usually within 12–24 hours. * **Discharge:** As decomposition progresses, gases (like $H_2S$, $NH_3$, and methane) build up in the abdominal cavity. This increased pressure forces "purge fluid"—a reddish-brown, frothy discharge—out of the mouth and nostrils. * **Degloving:** This refers to the peeling of the skin of the hands and feet (glove and stocking pattern). It occurs due to the liquefaction of the basal layer of the epidermis, causing the skin to loosen and slide off, often seen in advanced decomposition or immersion (drowning). **High-Yield Clinical Pearls for NEET-PG:** * **First internal sign of putrefaction:** Discoloration of the lining of the abdominal wall. * **First external sign of putrefaction:** Greenish discoloration over the Right Iliac Fossa. * **Casper’s Dictum:** Ratio of the rate of putrefaction in Air : Water : Earth is **1 : 2 : 8**. * **Marbling:** A specific discoloration pattern caused by the reaction of $H_2S$ with hemoglobin in superficial veins, appearing at 36–48 hours.

Question 115: Cadaveric spasm is defined as which of the following?

A. Immediate after death (Correct Answer)
B. After 2 hours of death
C. Affects voluntary muscles
D. Affects involuntary muscles

Explanation: **Explanation:** **Cadaveric Spasm** (also known as Instantaneous Rigor) is a rare medicolegal phenomenon where a group of voluntary muscles, which were in a state of intense contraction immediately before death, do not relax but pass directly into a state of rigidity. **Why Option A is Correct:** Unlike primary flaccidity (the normal stage where muscles relax immediately after death), cadaveric spasm occurs **immediately at the moment of death**. There is no intervening period of muscle relaxation. It is usually associated with sudden death under conditions of intense emotion, fear, or great physical exertion. **Why Other Options are Incorrect:** * **Option B:** Rigor mortis typically begins 1–2 hours after death. Cadaveric spasm is distinguished by its **instantaneous** onset. * **Option C & D:** While the question asks for the definition (timing), it is important to note that cadaveric spasm **only affects voluntary muscles**. It does not affect involuntary muscles (like the heart or intestines), which follow the standard stages of rigor mortis. **High-Yield Clinical Pearls for NEET-PG:** * **Mechanism:** It is believed to be due to the sudden exhaustion of ATP at the moment of death, preventing the detachment of actin-myosin cross-bridges. * **Medicolegal Significance:** It is of great importance in determining the **manner of death**. It cannot be simulated after death. * *Example:* A weapon firmly gripped in a hand indicates suicide; weeds or grass gripped in the hand of a drowning victim indicates they were alive when they entered the water. * **Comparison:** Unlike Rigor Mortis, which is generalized, Cadaveric Spasm is **localized** to specific muscle groups (e.g., the hand).

Question 116: Cardiac polyp is seen in which of the following conditions?

A. Acute nephritis
B. Endocarditis
C. Septicemia
D. Postmortem clot (Correct Answer)

Explanation: **Explanation:** The term **"Cardiac Polyp"** is a classic forensic misnomer used to describe a specific type of **postmortem clot**, specifically the **"Chicken Fat" clot**. **1. Why Postmortem Clot is Correct:** During the slow process of cooling after death (algor mortis), red blood cells settle due to gravity (sedimentation). If the blood clots slowly, the upper layer consists of clear, yellowish plasma and fibrin, while the lower layer contains the settled RBCs. The yellowish, translucent, and elastic upper portion resembles "chicken fat." When these clots entangle within the trabeculae carneae of the heart chambers, they can mimic a polypoid growth, hence the name "Cardiac Polyp." Unlike antemortem thrombi, these are not attached to the vessel wall and can be easily stripped off. **2. Why Other Options are Incorrect:** * **Acute Nephritis & Septicemia:** These conditions may lead to rapid death or DIC (Disseminated Intravascular Coagulation). In rapid deaths, blood often remains fluid due to increased fibrinolysin activity, making the formation of distinct "chicken fat" clots (cardiac polyps) less likely. * **Endocarditis:** This condition is associated with **vegetations** (friable masses of fibrin and platelets). While these are antemortem growths, they are pathologically distinct from the postmortem sedimentation seen in cardiac polyps. **3. High-Yield Facts for NEET-PG:** * **Chicken Fat Clot:** Yellowish, elastic, non-adherent (Postmortem). * **Currant Jelly Clot:** Dark red, homogenous, soft (Postmortem). * **Antemortem Thrombus:** Characterized by **Lines of Zahn**, friability, and firm adherence to the endocardium/vessel wall. * **Crucial Distinction:** Postmortem clots take the shape of the vessel (cast), whereas antemortem thrombi do not.

Question 117: Which is the surest sign of brain stem death?

A. Absent Doll's eye reflex
B. Fixed dilated pupils not reacting to light (Correct Answer)
C. Cheyne-Stokes breathing
D. Decerebrate posture

Explanation: **Explanation:** Brain stem death is defined as the irreversible loss of function of the brain stem, which includes the midbrain, pons, and medulla oblongata. Since the brain stem controls vital reflexes and consciousness, its cessation is synonymous with legal death in many jurisdictions. **Why Option B is Correct:** The **pupillary light reflex** is a primary brainstem reflex involving the midbrain (Cranial Nerves II and III). In brain stem death, the pupils become **fixed and dilated** (mid-position to dilated, 4-9 mm) and show no constriction to light. This signifies a complete loss of autonomic control and midbrain function. While other reflexes are also tested, fixed dilated pupils are considered the most definitive clinical sign of irreversible brainstem damage in the context of a brain death examination. **Why Other Options are Incorrect:** * **A. Absent Doll’s eye reflex (Oculocephalic reflex):** While this reflex is absent in brain death, it is considered less definitive than pupillary changes because it can be affected by cervical spine injuries or vestibular suppressants. * **C. Cheyne-Stokes breathing:** This is a pattern of periodic breathing often seen in cortical damage or heart failure. In true brain stem death, there is **apnea** (total cessation of spontaneous breathing), not just an abnormal pattern. * **D. Decerebrate posture:** This indicates a lesion in the brainstem (specifically below the red nucleus), but the presence of *any* motor posturing actually proves that the brainstem is still partially functional. In brain death, there must be a total absence of motor responses to pain. **High-Yield Clinical Pearls for NEET-PG:** * **Prerequisites for testing:** The patient must be in a deep coma of known etiology, on a ventilator, and have no reversible causes (hypothermia <32°C, drug intoxication, or neuromuscular blockers). * **The Apnea Test:** This is the final and most mandatory clinical test to confirm brain stem death. * **Reflexes lost:** Pupillary, Corneal, Oculovestibular (Caloric), Oculocephalic, and Gag/Cough reflexes.

Question 118: After a postmortem examination, to whom is the body handed over?

A. The authority who conducted the inquest in that particular case (Correct Answer)
B. The police station nearby
C. The coroner
D. The chief magistrate

Explanation: ### Explanation **1. Why the Correct Answer is Right:** In India, a medicolegal autopsy is a legal requirement initiated by an **Investigating Officer (IO)**. According to the Code of Criminal Procedure (CrPC), the medical officer performs the autopsy on behalf of the state to assist in a legal inquiry. Once the examination is complete, the doctor has no legal jurisdiction to release the body directly to the relatives. The body must be handed back to the **authority who conducted the inquest** (usually the Police Officer or the Magistrate) via a formal handover memo. It is then the responsibility of that authority to release the body to the legal heirs. **2. Why the Incorrect Options are Wrong:** * **B. The police station nearby:** The body is handed over specifically to the Investigating Officer (IO) who submitted the formal request (requisition) for the autopsy, not just any random or nearby police station. * **C. The coroner:** The Coroner system was abolished in India (lastly in Mumbai in 1999). Currently, India follows the Police/Magistrate Inquest system. * **D. The chief magistrate:** While a Magistrate can conduct an inquest (Section 176 CrPC), the body is handed over to the specific official (Executive Magistrate) who initiated the process for that case, not necessarily the "Chief" Magistrate. **3. High-Yield Facts for NEET-PG:** * **Inquest Types:** In India, two types exist: **Police Inquest (Section 174 CrPC)**—the most common; and **Magistrate Inquest (Section 176 CrPC)**—mandatory in cases of custodial deaths, dowry deaths (within 7 years of marriage), or police firing. * **Dead Body Challan:** The formal document sent by the police to the doctor requesting an autopsy. * **Viscera Preservation:** If poisoning is suspected, viscera are preserved, sealed, and handed over to the **police constable**, who ensures they reach the Forensic Science Laboratory (FSL). * **Time Limit:** There is no legal time limit to start an autopsy, but it should be done as soon as possible (ideally in daylight) to avoid decomposition artifacts.

Question 119: In embalming, through which vessels is the solution typically administered?

A. Veins
B. Arteries (Correct Answer)
C. Lymphatics
D. None of the above

Explanation: **Explanation:** **Why Arteries are Correct:** Embalming is the process of preserving a body to delay decomposition. The **arterial system** is the preferred route because it utilizes the body's natural high-pressure distribution network. When an embalming fluid (typically a mixture of formaldehyde, methanol, and water) is injected into a major artery—most commonly the **femoral, common carotid, or axillary artery**—it travels through the branching arterial tree to the arterioles and finally the capillaries. This ensures the preservative reaches the deep tissues and cells of the entire body uniformly. **Why Other Options are Incorrect:** * **Veins:** Veins contain valves that prevent the retrograde flow of fluid, which would block the distribution of the embalming solution. Instead, veins (specifically the internal jugular) are used for **drainage** to allow blood to exit as the preservative fluid displaces it. * **Lymphatics:** The lymphatic system is a low-pressure, fragmented network that does not reach all tissues effectively and lacks the structural integrity to handle the pressure of an embalming machine. **High-Yield NEET-PG Pearls:** * **Commonly used fluid:** Formalin (10% buffered) is the primary preservative. * **Trocar Injection:** Used for "cavity embalming" to treat internal organs that arterial injection might miss. * **Ideal Timing:** Embalming should ideally be performed before **rigor mortis** fully sets in or after it has passed, as muscle contraction can impede fluid distribution. * **Medicolegal Note:** Embalming should never be done before a medicolegal autopsy, as it destroys toxicological evidence and alters the appearance of injuries.

Question 120: For exhumation, the order should be passed by which authority?

A. Chief Judicial Magistrate
B. Executive Magistrate (Correct Answer)
C. Police Officer
D. Sessions Judge

Explanation: **Explanation:** **1. Why Executive Magistrate is Correct:** Exhumation is the lawful disinterment of a buried body for medicolegal examination. Under **Section 176(2) of the CrPC** (now Section 196 of the Bharatiya Nagarik Suraksha Sanhita/BNSS), the authority to order an exhumation rests solely with the **Executive Magistrate** (e.g., District Magistrate, Sub-divisional Magistrate, or Tehsildar). This is because exhumation is considered an extension of the "Inquest" process, which is an administrative-legal function rather than a purely judicial or investigative one. **2. Why Other Options are Incorrect:** * **Chief Judicial Magistrate & Sessions Judge:** While these authorities have higher judicial powers, they do not typically issue exhumation orders. In India, the legal framework delegates the administrative control of dead bodies and inquests to the Executive branch to ensure immediate action. * **Police Officer:** A police officer (even of high rank) can request an exhumation if foul play is suspected, but they do not have the legal power to *order* it. They must apply to the Executive Magistrate to obtain the necessary permission. **3. High-Yield Facts for NEET-PG:** * **Time Limit:** In India, there is **no time limit** for exhumation (unlike in some countries like France, where it is 10 years). It can be done as long as the remains (bones/teeth) are available. * **Timing:** Exhumation should ideally be performed in the **early morning** to avoid public scrutiny and the heat of the day. * **Procedure:** The Medical Officer must collect samples of the **surrounding soil** (from above, below, and all four sides of the coffin/body) to rule out environmental contamination (e.g., arsenic from the soil) during toxicology. * **Identification:** The presence of the **grave digger** and relatives is essential for the identification of the grave and the deceased.

Practice by Chapter

Objectives of Medicolegal Autopsy

Practice Questions

Autopsy Procedures

Practice Questions

External Examination

Practice Questions

Internal Examination

Practice Questions

Special Autopsy Techniques

Practice Questions

Organ Retention and Disposal

Practice Questions

Collection of Toxicological Samples

Practice Questions

Autopsy Report Writing

Practice Questions

Histopathology in Autopsies

Practice Questions

Microbiology in Autopsies

Practice Questions

Radiology in Autopsies

Practice Questions

Limitations and Artifacts

Practice Questions

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