Medicolegal Autopsies — MCQs
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When should exhumation be performed?
'Cot death' is associated with
During autopsy for virology study which agent is used for storing tissue:
Method of autopsy in which organs of various systems are removed en masse:
A body found in water shows signs of washerwoman's hands. What does this suggest?
During autopsy of a fetal death case, what is the correct order of examination to differentiate between live birth and stillbirth?
Which term refers to the stiffening of muscles immediately after death, typically in cases of sudden and violent death?
A middle-aged man is found dead with a gunshot wound to the chest. Which type of autopsy incision is most appropriate for a detailed examination?
In a forensic investigation, what does the presence of fixed livor mortis indicate about the time elapsed since death?
Postmortem blood is collected from which vessel?
Medicolegal Autopsies Indian Medical PG Practice Questions and MCQs
Question 151: When should exhumation be performed?
- A. Early morning (Correct Answer)
- B. Evening
- C. Any time
- D. Night
Explanation: ***Early morning*** - Exhumations are typically performed in the **early morning hours** to avoid onlookers and ensure privacy for the delicate procedure. - This timing also allows for the **optimal use of daylight** for examination and minimizes exposure to heat or extreme weather conditions later in the day. *Evening* - Performing exhumation in the evening can significantly **reduce available daylight**, making the examination of remains and scene documentation more challenging. - It may also attract more public attention and scrutiny, which is generally avoided for such sensitive procedures. *Any time* - While legally exhumation can proceed at various times with proper authorization, performing it at "any time" lacks consideration for **practicalities and ethical concerns**. - **Optimal conditions** (e.g., daylight, minimal public presence) are crucial for thorough and respectful investigation, which are not guaranteed at just "any time." *Night* - Exhumation at night presents significant challenges due to **limited visibility**, which can compromise the detailed examination of the grave site and remains. - The use of artificial lighting may create shadows and hinder the discovery of subtle evidence, impacting the overall accuracy of the investigation.
Question 152: 'Cot death' is associated with
- A. Negative autopsy (Correct Answer)
- B. Summer season
- C. Age group above 2 years
- D. Female sex
Explanation: ***Negative autopsy*** - **Sudden Infant Death Syndrome (SIDS)**, often referred to as 'cot death', is a diagnosis of exclusion, meaning it is applied when a thorough **investigation** and **autopsy** fail to identify a cause of death. - This characteristic "negative autopsy" is a defining feature, signifying that the death remains unexplained even after exhaustive medical and forensic examination. *Summer season* - SIDS incidence tends to be higher in the **winter months**. This is possibly due to factors like increased respiratory infections or overheating from bundling infants in colder weather. - The **summer season** does not correlate with an increased risk of SIDS. *Age group above 2 years* - SIDS primarily affects infants, with the majority of cases occurring between **2 and 4 months of age**. - It is extremely rare in children older than **1 year**, and virtually unheard of beyond 2 years. *Female sex* - SIDS shows a slight predilection for **male infants**. - While not a strong differentiator, the **female sex** is not considered a risk factor or associated with increased incidence of SIDS.
Question 153: During autopsy for virology study which agent is used for storing tissue:
- A. Alcohol
- B. Rectified spirit
- C. Sodium chloride
- D. 50% glycerine (Correct Answer)
Explanation: ***50% glycerine*** - **Glycerine** is commonly used for preserving tissues for virological studies because it helps to maintain viral viability by preventing **desiccation** and **denaturation** of viral particles. - It acts as a **cryoprotectant**, stabilizing cell membranes and protein structures, which is crucial for subsequent **viral isolation** and detection. *Alcohol* - **Alcohol** acts as a **fixative** by denaturing proteins and dehydrating tissues, which would inactivate most viruses and make them unsuitable for viability studies. - While useful for histopathology, it is not appropriate for preserving viral infectivity or integrity. *Rectified spirit* - **Rectified spirit** is a highly concentrated form of alcohol (typically 95% ethanol), and like alcohol, it causes **protein denaturation** and **dehydration**. - This property makes it unsuitable for preserving viral viability for subsequent virological studies. *Sodium chloride* - **Sodium chloride** alone in isotonic solutions can maintain tissue hydration but does not provide adequate **viral stabilization** or protection against degradation. - It would not prevent **enzymatic degradation** or maintain viral infectivity over time, especially at room temperature.
Question 154: Method of autopsy in which organs of various systems are removed en masse:
- A. Lettulle (Correct Answer)
- B. Virchow
- C. Rokitansky
- D. Ghon
Explanation: ***Lettulle*** - The **Lettulle method** (or en masse method) involves the removal of organs in large blocks or as a single unit, which helps preserve anatomical relationships. - This technique is particularly useful for studying the **interrelationships between organs** and the spread of disease involving multiple systems. *Virchow* - The **Virchow method** involves the individual removal of each organ, which allows for detailed examination of each organ separately. - This method is straightforward but can disrupt the **anatomical relationships** between organs. *Rokitansky* - The **Rokitansky method** involves *in situ* dissection of organs, with the organs remaining largely in the body during dissection. - This technique is valued for maintaining the **topographical integrity** of organ systems within the body cavity. *Ghon* - The **Ghon method** is a modified block dissection method, focusing on the removal of specific organ blocks. - This often includes the **thoracic and abdominal organs** together, maintaining their anatomical connections.
Question 155: A body found in water shows signs of washerwoman's hands. What does this suggest?
- A. Prolonged submersion in water (Correct Answer)
- B. Death by drowning
- C. Recent death from other causes
- D. Brief submersion after death
Explanation: ***Prolonged submersion in water*** - **Washerwoman's hands** (or **postmortem wrinkling**) result from the **absorption of water** by the epidermis, causing it to swell and become wrinkled. - This change is indicative of a body having been submerged in an aqueous environment for an **extended period** (typically several hours or more), irrespective of the cause of death. - The key diagnostic feature is the **duration of submersion**, not whether death occurred before or after entering the water. *Death by drowning* - While drowning involves submersion, **washerwoman's hands** are a sign of **prolonged immersion**, not specifically the mechanism of death itself. - Washerwoman's hands can occur in bodies placed in water after death from other causes, so this finding does not prove drowning. *Recent death from other causes* - **Washerwoman's hands** are a postmortem change requiring **several hours** for water absorption, thus ruling out a **recent death**. - Other signs like **lividity** and **rigor mortis** would be more indicative of a recent death, depending on the timeline. *Brief submersion after death* - **Washerwoman's hands** require **prolonged immersion** (typically 2-4 hours for hands, 12-24 hours for feet) to develop. - A body submerged for only a brief time after death would not exhibit this phenomenon, as insufficient time has elapsed for epidermal water absorption and wrinkling to occur.
Question 156: During autopsy of a fetal death case, what is the correct order of examination to differentiate between live birth and stillbirth?
- A. Thorax > head > abdomen
- B. Abdomen > thorax > head
- C. Thorax > abdomen > head
- D. Head > thorax > abdomen (Correct Answer)
Explanation: ### Explanation: Order of Fetal Autopsy The correct sequence for a fetal autopsy to determine live birth is **Head > Thorax > Abdomen**. #### 1. Why "Head First"? The primary goal in determining live birth is to assess the **Hydrostatic (Raygat’s) Test** and the **Stomach-Bowel (Breslau’s) Test**. * If the **thorax** or **abdomen** is opened first, blood from the large vessels (like the superior vena cava or portal vein) can drain downwards due to gravity. * Opening the **head first** allows the blood to drain from the cranial sinuses, effectively **decongesting the thoracic and abdominal organs**. This prevents artificial congestion and ensures that when the lungs and intestines are later tested for air, the results are not confounded by excessive blood volume or accidental trauma to the diaphragm. #### 2. Analysis of Incorrect Options * **Thorax > Head > Abdomen (A & C):** Opening the thorax first is the standard procedure in adult autopsies but is avoided in fetuses. Manipulating the chest before the head can cause blood to pool in the thoracic cavity, potentially obscuring signs of respiration or causing artifacts in the hydrostatic test. * **Abdomen > Thorax > Head (B):** While the abdomen contains the stomach (Breslau’s test), opening it first does not provide the necessary decompression of the venous system that the cranial opening provides. #### 3. High-Yield Clinical Pearls for INI-CET * **Hydrostatic Test:** Based on the principle that lungs that have breathed will float in water. **False positives** occur in putrefaction (gas formation); **False negatives** occur in secondary atelectasis or pneumonia. * **Wredin’s Test:** Presence of air in the **middle ear** indicates the infant lived long enough to perform swallowing/breathing actions. * **Breslau’s Second Life Test:** If the stomach and intestines float, it indicates the child survived long enough to swallow air. * **Spalding’s Sign:** An X-ray finding in *intrauterine* death showing overlapping of cranial bones due to liquefaction of the brain (occurs 4–7 days after death).
Question 157: Which term refers to the stiffening of muscles immediately after death, typically in cases of sudden and violent death?
- A. Algor mortis
- B. Rigor mortis
- C. Cadaveric spasm (Correct Answer)
- D. Livor mortis
Explanation: ***Cadaveric spasm*** - This phenomenon, also known as **instantaneous rigor**, is characterized by the immediate and persistent stiffening of muscles at the moment of death. It occurs without the flaccid stage seen with rigor mortis. - It is typically associated with deaths involving intense **emotional stress**, **violent action**, or **sudden loss of consciousness**, such as drowning, suicide, or combat, and can indicate the position or action of the deceased at the time of death. *Algor mortis* - This refers to the **cooling of the body** after death, a gradual process that helps in estimating the time of death, but does not involve muscle stiffening. - The body temperature progressively approaches the **ambient temperature** following death. *Rigor mortis* - This is the **stiffening of muscles** that develops **gradually** after death, typically setting in 2-6 hours after death, reaching its maximum at 12-24 hours, and then gradually disappearing. - It results from the **depletion of ATP**, preventing the dissociation of actin and myosin filaments in muscle fibers. *Livor mortis* - This is the **purplish discoloration** of the skin that occurs after death due to the gravitational pooling of blood in the capillaries, seen in dependent parts of the body. - It can help in determining the **position of the body** at the time of death and if the body has been moved.
Question 158: A middle-aged man is found dead with a gunshot wound to the chest. Which type of autopsy incision is most appropriate for a detailed examination?
- A. Y-shaped incision (Correct Answer)
- B. I-shaped incision
- C. S-shaped incision
- D. U-shaped incision
Explanation: ***Y-shaped incision*** - The **Y-shaped incision** is the most common and appropriate incision in forensic autopsies, especially for cases involving the chest and abdomen, as it provides excellent exposure to both. - It involves incisions extending from the shoulders meeting at the sternum, and then continuing down to the pubic bone, allowing for thorough examination of **thoracic and abdominal organs** and major vessels for evidence of injury. *I-shaped incision* - An **I-shaped incision** runs directly from the sternal notch to the pubic symphysis, offering good access to internal organs but is less cosmetically favorable and offers less lateral chest wall exposure. - This incision is primarily used for **organ harvesting** or in situations where cosmetic appearance post-mortem is not a major concern. *S-shaped incision* - The **S-shaped incision** is sometimes used in specific cases to avoid certain areas or for better cosmetic closure but is not standard for comprehensive forensic autopsies, especially for trauma. - It does not provide the broad and symmetrical exposure needed for a detailed investigation of a **gunshot wound to the chest**. *U-shaped incision* - A **U-shaped incision** is primarily used for specific examinations, often involving the scalp to expose the skull, and is not suitable for opening the chest and abdomen. - This incision is typically reserved for accessing the **cranial cavity** during an autopsy.
Question 159: In a forensic investigation, what does the presence of fixed livor mortis indicate about the time elapsed since death?
- A. More than 12 hours (Correct Answer)
- B. More than 24 hours
- C. 12-24 hours
- D. Less than 12 hours
Explanation: ***More than 12 hours*** - **Fixed (non-blanching) livor mortis** indicates that the pooling of blood in dependent capillaries has become permanent and will not blanch with pressure. - Fixation of livor mortis typically occurs between **8-12 hours post-mortem**, meaning that the presence of fixed livor mortis indicates death occurred **more than 12 hours ago**. - Once fixed, livor mortis remains permanent indefinitely (through 24 hours, 48 hours, and beyond), making "more than 12 hours" the most accurate answer for when fixed livor mortis is present. *Less than 12 hours* - Within the first **8-12 hours**, livor mortis is typically still **unfixed (blanching)**, meaning the discolored areas will blanch when pressure is applied. - The pooling of blood in this early phase is still responsive to external pressure, making it non-fixed and thus distinguishing it from the later fixed stage. - Therefore, the presence of **fixed** livor mortis rules out a time frame of less than 12 hours. *12-24 hours* - While fixed livor mortis is indeed present during the 12-24 hour period, this time frame is **too narrow**. - Fixed livor mortis, once established (by 8-12 hours), remains fixed indefinitely - at 24 hours, 48 hours, and even during early decomposition. - The question asks what fixed livor mortis indicates, not when it first becomes fixed, making the broader time frame "more than 12 hours" more accurate. *More than 24 hours* - This is **too restrictive** - fixed livor mortis is already well-established by 12-24 hours post-mortem. - By excluding the 12-24 hour period, this option incorrectly suggests that fixed livor mortis only appears after 24 hours. - While other post-mortem changes like decomposition become more prominent after 24 hours, fixed livor mortis alone indicates death occurred more than 12 hours ago, not necessarily more than 24 hours.
Question 160: Postmortem blood is collected from which vessel?
- A. Femoral artery
- B. Femoral vein (Correct Answer)
- C. Cephalic vein
- D. Brachial artery
Explanation: ***Femoral vein*** - The **femoral vein** is the preferred site for postmortem blood collection due to its large size and accessibility, especially in cases of decomposition or trauma. - Blood samples from the femoral vein are less prone to contamination from other body fluids and provide reliable results for toxicology and chemical analysis. *Femoral artery* - While the femoral artery is also accessible, it is generally avoided for postmortem blood collection because arterial blood can clot quickly, making aspiration difficult. - Additionally, arterial punctures may cause more damage to surrounding tissues, complicating further forensic examination. *Cephalic vein* - The cephalic vein, located in the arm, is a peripheral vein that can be used for blood collection but is not the primary choice for postmortem samples due to its smaller size. - It may be difficult to access in certain postmortem conditions, and the volume of blood obtained might be insufficient for comprehensive analysis. *Brachial artery* - Similar to the femoral artery, the brachial artery is an arterial site whose use is generally avoided due to the higher risk of clotting and difficulty in obtaining a sufficient sample. - Accessing the brachial artery postmortem can also be more invasive and interfere with other forensic procedures.
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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