Medicolegal Autopsies Practice Questions

Q: Which of the following is true regarding a posthumous child?

Born after the death of the father. **Explanation:** The term **Posthumous Child** refers to a child born after the death of their biological father. In legal and forensic contexts, this distinction is crucial for matters concerning inheritance, succession rights, and legitimacy. * **Why Option A is Correct:** By definition, "posthumous" means "after death." If a woman is pregnant at the time of her husband's death and subsequently delivers a live child, that child is posthumously born. Under Indian law, such a child is considered a legal heir as if they were born during the father's lifetime. **Analysis of Incorrect Options:** * **Option B (Stillborn child):** A stillborn child is one born dead after the 28th week of gestation (viability). A posthumous child must be born alive to exercise legal rights. * **Option C (Fictitious child):** This refers to a **Supposititious Child**, where a woman pretends to be pregnant or delivers a child that is not hers to claim inheritance or property. * **Option D (Illegitimate child):** This is a child born out of wedlock. A posthumous child is typically legitimate, provided the birth occurs within the maximum legal period of gestation (280 days in India) following the father's death. **High-Yield Facts for NEET-PG:** * **Maximum Gestation Period:** Under **Section 112 of the Indian Evidence Act**, the law presumes legitimacy if a child is born within **280 days** after the dissolution of marriage (including death), provided the mother remains unmarried. * **Viability:** In India, a fetus is considered legally viable at **28 weeks** (7 months). * **Corpus Delicti:** In infanticide cases, the "body of offense" must be established, proving the child was born alive and died due to a criminal act.

Q: Honeycombing of the liver is a characteristic finding in which condition?

Putrefaction. **Explanation:** **Honeycombing of the liver** (also known as **Foamy Liver**) is a classic post-mortem finding associated with **Putrefaction**. 1. **Why Putrefaction is correct:** During the decomposition process, gas-producing anaerobic bacteria (primarily *Clostridium welchii/perfringens*) migrate from the colon into the blood vessels and solid organs. These bacteria ferment carbohydrates and proteins, releasing gases (hydrogen, methane, and carbon dioxide). In the liver, these gas bubbles accumulate within the parenchyma, creating numerous small, empty spaces. On sectioning, the liver appears porous and spongy, resembling a **honeycomb** or **Swiss cheese**. 2. **Why the other options are incorrect:** * **Cirrhosis:** Characterized by regenerative nodules and fibrous septa, giving the liver a "hobnail" appearance, not a gaseous honeycomb structure. * **Rupture:** Usually results from blunt trauma, leading to linear or stellate lacerations and subcapsular hematomas. * **Hydatid disease:** Caused by *Echinococcus granulosus*, it typically presents with large, fluid-filled unilocular cysts with a "water lily sign" on imaging, rather than diffuse honeycombing. **High-Yield Clinical Pearls for NEET-PG:** * **Foamy Organs:** While the liver is most commonly affected, honeycombing can also be seen in the brain, spleen, and kidneys during advanced putrefaction. * **Casper’s Dictum:** A rule of thumb for the rate of putrefaction; 1 week in air = 2 weeks in water = 8 weeks in earth. * **Tache Noire:** A brownish-black triangular opacity on the sclera due to drying (another post-mortem sign). * **Saponification (Adipocere):** Occurs in moist, anaerobic environments where body fat is converted into a waxy, soap-like substance.

Q: Foaming liver is seen in which condition?

Gas gangrene. **Explanation:** **Correct Option: C (Gas gangrene)** The term "Foaming Liver" (or *Hepatitis emphysematosa*) refers to a characteristic post-mortem appearance where the liver becomes soft, crepitant, and riddled with gas bubbles. This occurs due to infection by **Clostridium perfringens** (the causative agent of gas gangrene). These anaerobic, gas-producing bacilli invade the liver either pre-mortem or as part of rapid post-mortem decomposition. They ferment glycogen and tissue proteins, releasing gases (hydrogen and carbon dioxide) that create a "Swiss cheese" or spongy, foamy appearance on the cut surface. **Analysis of Incorrect Options:** * **A. Organophosphorus Poisoning:** Characterized by a "kerosene-like" odor, pulmonary edema, and froth at the mouth/nostrils, but it does not cause gas formation within solid organs. * **B. Actinomycosis:** Classically associated with a **"Honeycomb liver"** (multiple abscesses with a firm, fibrous stroma) rather than a foamy one. It is caused by *Actinomyces israelii*. * **D. Anthrax:** Caused by *Bacillus anthracis*, it leads to massive splenomegaly (**"Jammy spleen"**) and hemorrhagic meningitis, but not a foamy liver. **High-Yield Clinical Pearls for NEET-PG:** * **Foaming Liver:** Pathognomonic for *Clostridium perfringens* infection. * **Nutmeg Liver:** Seen in Chronic Passive Congestion (CPC) of the liver (e.g., Right-sided Heart Failure). * **Zahn’s Infarct:** A pseudo-infarct of the liver caused by obstruction of a branch of the portal vein. * **Frothy Secretions:** While "foaming liver" is gas gangrene, "fine white froth" at the mouth is a classic sign of Drowning or Opioid overdose.

Q: Which of the following is NOT a test used to confirm stoppage of circulation?

Mirror test. ### Explanation The diagnosis of death involves confirming the permanent cessation of vital functions: circulation, respiration, and brain activity (Bichat’s Tripod of Life). **Why "Mirror Test" is the correct answer:** The **Mirror Test** is used to confirm the **stoppage of respiration**, not circulation. It involves holding a cold mirror in front of the mouth and nostrils; if respiration persists, water vapor condenses on the glass, fogging it. Since the question asks for tests *not* used for circulation, this is the correct choice. **Analysis of Incorrect Options (Tests for Circulation):** * **Magnus Test:** A finger is tightly ligated with a string. In a living person, the fingertip becomes cyanosed and swollen due to venous stasis. In death, no color change occurs because circulation has ceased. * **Icard’s Test (Fluorescein Test):** Fluorescein dye is injected intravenously. If circulation is present, the skin and eyes turn greenish-yellow within minutes. No color change indicates somatic death. * **Pressure Test (Winslow’s Test):** This involves placing a vessel of water or mercury on the chest. If the heart is still beating, the surface of the liquid will show rhythmic ripples or pulsations. (Note: Diaphanous test and Fingernail pressure test are also related clinical assessments for circulation). **High-Yield Clinical Pearls for NEET-PG:** * **Bichat’s Tripod of Life:** Comprises the Heart (Circulation), Lungs (Respiration), and Brain (Nervous System). * **Feather Test:** Another test for **respiration** where a fine feather is held near the nose/mouth to detect air movement. * **Magnus Test Warning:** It should not be applied for more than 5–10 minutes in a suspected living person to avoid gangrene. * **Definitive Sign:** The most reliable clinical sign of circulatory arrest is the absence of heart sounds on auscultation for a continuous period of **5 minutes**.

Q: Mummification is typically seen in which stage of intrauterine death?

Late intrauterine death. **Explanation:** **Mummification** in the context of intrauterine death (IUD) is a sterile process of dehydration and shriveling of the fetus. It occurs specifically in **Late Intrauterine Death** (Option B) because it requires a certain level of fetal development and specific environmental conditions within the womb. 1. **Why Late IUD is Correct:** For mummification to occur, the fetus must have reached a gestational age where the skin is developed enough to resist immediate maceration, and the amniotic fluid must be deficient or absorbed (oligohydramnios). In late IUD, if the membranes remain intact and the environment is sterile, the fetal tissues undergo slow dehydration, turning the fetus into a dry, shriveled, leathery, and brownish-black mass. 2. **Why Early IUD is Incorrect:** In early pregnancy (first trimester), fetal death usually leads to complete resorption of the embryo or the formation of a "blighted ovum." The tissues are too primitive and watery to undergo the mummification process. 3. **Why Option C is Incorrect:** Since the process is dependent on fetal maturity and specific fluid dynamics found only in later stages, it cannot occur in early IUD. **High-Yield Clinical Pearls for NEET-PG:** * **Maceration:** This is the more common process in IUD, characterized by aseptic autolysis in the presence of amniotic fluid. It begins with "skin slipping" (Spalding’s sign on X-ray). * **Prerequisite for Mummification:** It occurs only if the membranes are **intact** and the fetus is **not infected**. If membranes rupture, putrefaction (liquefaction) occurs instead. * **Lithopedion:** If a mummified fetus (usually extrauterine) undergoes calcification, it is known as a "Stone Baby." * **Key Difference:** Maceration = Wet/Aseptic Autolysis; Mummification = Dry/Dehydration.

Q: Maggots are typically observed on a dead body after how many days?

2-3 days. **Explanation:** The appearance of maggots is a crucial indicator in **Forensic Entomology** for estimating the Post-Mortem Interval (PMI). **Why Option B is correct:** Flies (primarily blowflies like *Calliphora* and *Lucilia*) are attracted to a corpse almost immediately after death by the odor of decomposition. They lay eggs in moist areas like the eyes, nose, mouth, or open wounds. Under average tropical conditions, these eggs hatch into **larvae (maggots)** in approximately 8 to 24 hours. By **2 to 3 days**, these maggots become clearly visible to the naked eye as they begin to feed on the soft tissues, appearing as crawling white clusters. **Analysis of Incorrect Options:** * **Option A (One day):** While eggs may hatch within 24 hours, the larvae are often microscopic or hidden deep within orifices, making them difficult to "observe" as a prominent feature of decomposition. * **Option C & D (3-4 days / One week):** By this stage, the body enters the "active decay" phase. Maggots are not just appearing; they are already large, mature, and may even be migrating away from the body to pupate (usually by day 5-7). **High-Yield Clinical Pearls for NEET-PG:** * **Order of Appearance:** Eggs (8–24 hrs) → 1st Instar Larvae (24–36 hrs) → 2nd/3rd Instar Maggots (2–3 days) → Pupae (4–5 days) → Adult Fly (7–10 days). * **Casper’s Dictum:** Rates of putrefaction vary by medium. A body decomposes in **Air : Water : Earth** in a ratio of **1 : 2 : 8**. * **Temperature Sensitivity:** The rate of maggot development is highly temperature-dependent; heat accelerates the cycle, while cold slows it down. * **Medicolegal Importance:** Maggots can be used for **toxicological analysis** (Entomotoxicology) if the body tissues are too decomposed for standard sampling.

Q: What is the approximate ratio of respired lung weight to body weight?

1:35. ### Explanation This question tests your knowledge of **Hydrostatic (Floatation) Tests** used in forensic pathology to differentiate between a stillborn fetus and a live-born infant who has breathed. **1. Why Option C is Correct:** The ratio of lung weight to total body weight is a key indicator of whether respiration has occurred. * **In a live-born infant (respired lungs):** Once the infant breathes, pulmonary circulation increases significantly, and the lungs become engorged with blood and air. This increases the weight of the lungs relative to the body. The established ratio for respired lungs is approximately **1:35**. **2. Why the Other Options are Incorrect:** * **Option D (1:70):** This is the ratio for **unrespired (stillborn) lungs**. In a fetus that has never breathed, the lungs are solid, liver-like (hepatization), and contain less blood, making them lighter relative to the body weight. * **Options A and B (1:10 and 1:20):** These ratios are physiologically incorrect for neonatal autopsies. A ratio of 1:10 would imply the lungs make up 10% of the body weight, which is disproportionately heavy even for a breathing adult. **3. High-Yield Clinical Pearls for NEET-PG:** * **Fodere’s Test (Static Test):** This refers specifically to the weight of the lungs. * *Stillborn:* ~30–40 grams. * *Live-born:* ~60–80 grams. * **Ploucquet’s Test:** This is the specific name for the ratio test described in the question (Lung weight : Body weight). * **Raygat’s Test (Hydrostatic Test):** Based on the principle that respired lungs float in water (Specific Gravity < 1.000), while unrespired lungs sink (Specific Gravity ~1.040–1.050). * **False Positives:** Decomposition (gas formation) can make stillborn lungs float. * **False Negatives:** Severe pneumonia, pulmonary edema, or atelectasis can make live-born lungs sink.

Question 1

When post-mortem examinations of radioactive cadavers are performed, no special precautions are necessary provided that the radioactivity remaining in the cadaver does not exceed:

Accepted Answer

0.05 mCi of I-131

Answer

1.1 mCi of I-131

Answer

1.4 mCi of I-131

Answer

3.1 mCi of I-131

Question 2

Regarding autopsy techniques, which of the following statements is true?

Accepted Answer

Small intestine is opened along the mesenteric border and large intestines are opened along the anterior tenia.

Answer

Small intestine is opened along the anti-mesenteric border and large intestines are opened along the anterior tenia.

Answer

Small intestine is opened along the mesenteric border and large intestines are opened along the posterior tenia.

Answer

Small intestine is opened along the anti-mesenteric border and large intestines are opened along the posterior tenia.

Question 3

Which of the following is true regarding a posthumous child?

Accepted Answer

Born after the death of the father

Answer

A stillborn child

Answer

A fictitious child

Answer

An illegitimate child

Question 4

Honeycombing of the liver is a characteristic finding in which condition?

Accepted Answer

Putrefaction

Answer

Cirrhosis

Answer

Rupture

Answer

Hydatid disease

Question 5

Foaming liver is seen in which condition?

Accepted Answer

Gas gangrene

Answer

Organophosphorus Poisoning

Answer

Actinomycosis

Answer

Anthrax

Question 6

Which time is usually preferred for conducting an exhumation?

Accepted Answer

Early Morning

Answer

Evening

Answer

Night

Answer

Anytime

Question 7

Which of the following is NOT a test used to confirm stoppage of circulation?

Accepted Answer

Mirror test

Answer

Magnus test

Answer

I card test

Answer

Pressure test

Question 8

Mummification is typically seen in which stage of intrauterine death?

Accepted Answer

Late intrauterine death

Answer

Early intrauterine death

Answer

Both early and late intrauterine death

Answer

None of the above

Question 9

Maggots are typically observed on a dead body after how many days?

Accepted Answer

2-3 days

Answer

One day

Answer

3-4 days

Answer

One week

Question 10

What is the approximate ratio of respired lung weight to body weight?

Accepted Answer

1:35

Answer

1:10

Answer

1:20

Answer

1:70

Medicolegal Autopsies — MCQs

Medicolegal Autopsies — MCQs

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