Injuries and Their Significance — MCQs

Injuries and Their Significance Indian Medical PG Practice Questions and MCQs

Question 11: An 8-year-old child was run over by a rickshaw, leaving distinct tire tread markings on the body. How are these markings best defined?

A. Contact abrasions
B. Percolated abrasions
C. Imprint abrasions
D. Patterned abrasions (Correct Answer)

Explanation: ### **Explanation** **Correct Answer: D. Patterned abrasions** **1. Why it is correct:** A **patterned abrasion** is a type of impact abrasion where the force is applied perpendicular to the skin, leaving an impression that reproduces the shape, size, and surface characteristics of the offending object. In this case, the tire tread markings are a classic example. The weight of the rickshaw compresses the skin against the underlying bone, "printing" the design of the tire onto the body. Other common examples include whip marks, radiator grille marks, or the weave of a fabric. **2. Why the other options are incorrect:** * **A. Contact abrasions:** This is a general term often used in ballistics (contact wounds) or general trauma, but it lacks the specificity required to describe the reproduction of an object's design. * **B. Percolated abrasions:** This is not a standard forensic term. It may be confused with "pressure" or "petechial" hemorrhages, but it does not describe surface markings from a tire. * **C. Imprint abrasions:** While "imprint" describes the mechanism, "Patterned abrasion" is the standard medical and legal nomenclature used in forensic pathology to classify these injuries. **3. NEET-PG High-Yield Pearls:** * **Graze/Sliding Abrasions:** Occur due to tangential force (friction). They show "epithelial tags" which indicate the **direction of force** (tags are found at the distal end). * **Pressure Abrasions:** Caused by prolonged vertical pressure (e.g., ligature marks in hanging or strangulation). * **Post-mortem Abrasions:** These appear yellowish, translucent, and parchment-like, lacking the reddish-brown scab (vital reaction) seen in ante-mortem injuries. * **Tire Marks:** Can be of two types—**Patterned abrasions** (from the tread) or **Flaying/Degloving injuries** (due to the shearing force of the rotating wheel).

Question 12: Bevelling of the skull is seen in the:

A. Bevelling of the skull is seen in the:
B. Narrow end of the entry point in bullet injury
C. Exit point of bullet (Correct Answer)
D. Depressed fracture of the skull

Explanation: **Explanation:** **Bevelling** refers to the characteristic cone-shaped or slanted appearance of a bone defect caused by a projectile (bullet) passing through the skull. It occurs because the force of the projectile is distributed over a wider area as it moves from one layer of the skull to the next. 1. **Why Option C is Correct:** When a bullet exits the skull, it travels from the inner table to the outer table. As it strikes the outer table, it pushes the bone fragments outward, creating a defect that is wider on the outside than on the inside. This is known as **External Bevelling**, and it is a definitive sign of an **exit wound**. 2. **Why Other Options are Incorrect:** * **Option B (Entry Point):** At the point of entry, the bullet moves from the outer table to the inner table. This creates a defect that is wider on the inner table, known as **Internal Bevelling**. Therefore, the "narrow end" is on the outside, but the hallmark "bevelling" (the wider flare) is seen internally. * **Option D (Depressed Fracture):** While depressed fractures involve bone displacement, they do not typically show the classic cone-shaped bevelling associated with high-velocity projectile injuries. **High-Yield Clinical Pearls for NEET-PG:** * **Internal Bevelling:** Characteristic of an **Entrance Wound**. * **External Bevelling:** Characteristic of an **Exit Wound**. * **Puppé’s Rule:** If two fracture lines intersect, the second fracture line will not cross the pre-existing first fracture line. This helps determine the sequence of multiple impacts. * **Keyhole Sign:** Occurs when a bullet strikes the skull at a tangential angle, producing a defect that shows both internal and external bevelling at the same site.

Question 13: Brush burn is defined as:

A. Graze abrasion (Correct Answer)
B. Imprint abrasion
C. Electric burn
D. Arborescent burn

Explanation: **Explanation:** **Brush burn** is a specific type of **graze abrasion** (also known as a sliding or friction abrasion). It occurs when the body surface slides against a broad, rough, and blunt surface (like a road) with considerable force. The friction generates heat, which causes a "burning" appearance of the skin, though it is technically a mechanical injury rather than a thermal one. * **Why Option A is correct:** Graze abrasions are caused by tangential force. When these are extensive, as seen in "road rash" during motorcycle accidents, they are termed brush burns. They are characterized by the removal of the superficial layers of the epidermis, often showing "tags" of skin at the distal end, which helps determine the direction of force. * **Why Option B is incorrect:** Imprint (contact) abrasions occur when an object is pressed vertically onto the skin, leaving a "stamp" of its shape (e.g., a radiator grille pattern). There is no sliding motion involved. * **Why Option C is incorrect:** Electric burns are true thermal/chemical injuries caused by the passage of electric current, typically presenting as "joule burns" with a central crater and raised edges. * **Why Option D is incorrect:** Arborescent burns (Lichtenberg figures) are transient, fern-like patterns on the skin caused by lightning strikes, not friction. **High-Yield NEET-PG Pearls:** * **Direction of force:** In graze abrasions, skin tags are found at the **distal end** (the end towards which the force was directed). * **Post-mortem vs. Ante-mortem:** Ante-mortem abrasions show a reddish-brown scab (due to exudation), while post-mortem abrasions (parchmentization) appear yellowish and translucent. * **Graze abrasions** are the most common type of abrasion found in road traffic accidents (RTA).

Question 14: What is the Glasgow Coma Scale score in a deceased individual?

A. 0
B. 1
C. 2
D. 3 (Correct Answer)

Explanation: ### Explanation The **Glasgow Coma Scale (GCS)** is a clinical tool used to assess the level of consciousness based on three parameters: **Eye opening (E)**, **Verbal response (V)**, and **Motor response (M)**. **1. Why the Correct Answer is 3:** The GCS is calculated by summing the scores of the three components ($E + V + M$). Each component has a minimum possible score of **1**, representing no response: * **Eye opening (E):** No eye opening = 1 * **Verbal response (V):** No verbal response = 1 * **Motor response (M):** No motor response = 1 Therefore, the lowest possible mathematical score on the GCS is **3 ($1+1+1$)**. In a deceased individual, there is a total absence of neurological activity; however, because the scale does not utilize "0" as a value for any parameter, a dead person is assigned a score of 3. **2. Why the Incorrect Options are Wrong:** * **Options A, B, and C (0, 1, 2):** These are mathematically impossible on the GCS. Since the minimum score for each of the three categories is 1, a total score below 3 cannot exist in clinical practice or forensic assessment. **3. High-Yield Clinical Pearls for NEET-PG:** * **Range:** The GCS ranges from a **minimum of 3** (deep coma/death) to a **maximum of 15** (fully awake and oriented). * **Trauma Classification:** * **GCS 13–15:** Mild Head Injury * **GCS 9–12:** Moderate Head Injury * **GCS 3–8:** Severe Head Injury (Commonly cited: *"GCS of 8, intubate"*). * **Modified GCS:** For intubated patients, the verbal score is omitted or marked as "T" (e.g., GCS 5T), but the standard scale remains the primary exam focus. * **Teasdale and Jennett:** The creators of the GCS (1974).

Question 15: Harakiri, a method of suicide, is committed by performing which of the following actions?

A. Ripping the abdomen open (Correct Answer)
B. Jumping from a height
C. Shooting through the oral cavity
D. Stabbing over the head

Explanation: **Explanation:** **Harakiri** (also known as Seppuku) is a ritualistic form of suicide historically practiced in Japan. The term literally translates to "belly-cutting." **1. Why Option A is Correct:** The procedure involves **ripping the abdomen open** using a sharp instrument (traditionally a short sword or *tantō*). The individual makes a deep horizontal incision across the abdomen, often followed by an upward vertical flick. This results in massive evisceration and internal hemorrhage. In forensic medicine, this is classified as a specific, culturally-driven form of **self-inflicted abdominal incised/stab wound**. **2. Why the Other Options are Incorrect:** * **Option B (Jumping from a height):** This is known as **precipitation**. While a common method of suicide, it results in multiple fractures and internal organ deceleration injuries, not Harakiri. * **Option C (Shooting through the oral cavity):** This is a common site for **suicidal firearm injuries**. The bullet typically traverses the hard palate or brainstem, causing instantaneous death. * **Option D (Stabbing over the head):** Stabbing the skull is rare in suicide due to the resistance of the bone; suicidal stabs are more commonly directed at the precordium (heart) or neck. **High-Yield Clinical Pearls for NEET-PG:** * **Hesitation Cuts:** These are superficial, multiple, parallel incisions seen at the site of the fatal wound in suicides (common in wrist-slitting or throat-cutting). They are **absent** in Harakiri due to the ritualistic and "determined" nature of the act. * **Defense Wounds:** These are absent in Harakiri, as the act is self-inflicted. * **Cause of Death:** In Harakiri, death usually occurs due to **hemorrhagic shock** or subsequent peritonitis if the individual survives the initial trauma.

Question 16: Filigree burns occur in which type of injury?

A. Lightning strike (Correct Answer)
B. Electrocution
C. Vitrilage
D. Infanticide

Explanation: **Explanation:** **Filigree burns** (also known as **Lichtenberg figures**, arborescent marks, or fern-like patterns) are pathognomonic of a **lightning strike**. These are not true thermal burns but are transient, reddish, branching patterns on the skin. They are caused by the extravasation of red blood cells into the superficial layers of the skin due to the massive electrical discharge (dielectric breakdown) following a lightning strike. They typically appear within an hour of the injury and disappear within 24–48 hours. **Analysis of Options:** * **Electrocution (Option B):** High-voltage or low-voltage electricity typically produces "Joule burns" or "Electric burns," characterized by a central charred crater with raised, pale edges (entry wound). It does not produce branching filigree patterns. * **Vitriolage (Option C):** This refers to chemical burns caused by the throwing of corrosive substances (like sulfuric acid). These result in deep tissue destruction, trickling marks (run-off streaks), and permanent scarring, unlike the transient filigree marks. * **Infanticide (Option D):** This is a legal term for the killing of an infant. While various injuries can be seen in such cases (e.g., smothering, head trauma), filigree burns are not a specific feature of infanticide. **High-Yield Facts for NEET-PG:** * **Lichtenberg Figures:** They are **not permanent** and do not show inflammatory changes on histology. * **Flashover Effect:** Lightning often travels over the surface of the body (moist skin) rather than through it, which explains why some victims survive despite the massive voltage. * **Magnetization:** Metallic objects (keys, coins) in the victim's pocket may become magnetized—a diagnostic sign at the scene. * **Other Lightning Signs:** "Blast effects" (torn clothing), "Tympanic membrane rupture" (most common ear injury), and "Keraunoparalysis" (transient limb paralysis).

Question 17: What is meant by Falanga?

A. Beating on the soles with a blunt object (Correct Answer)
B. Beating on the ear with both palms
C. Beating on the abdomen
D. Suspension by wrists

Explanation: **Explanation:** **Falanga** (also known as bastinado) is a form of physical torture involving repeated beating on the **soles of the feet** with a blunt object, such as a rod, cane, or truncheon. 1. **Why Option A is Correct:** The medical significance of Falanga lies in its ability to cause intense pain and long-term disability without necessarily leaving obvious external marks initially. It leads to "closed compartment syndrome" of the small compartments of the feet, causing muscle necrosis, vascular damage, and chronic myofascial pain. Over time, it can result in permanent gait disturbances and the collapse of the plantar arches. 2. **Why Other Options are Incorrect:** * **Option B (Beating on the ear):** This is known as **Telephono**. It involves slapping both ears simultaneously with cupped palms, which can cause sudden air pressure changes leading to tympanic membrane rupture. * **Option C (Beating on the abdomen):** While common in custodial torture, it does not have a specific eponymous name like Falanga. * **Option D (Suspension by wrists):** This is referred to as **Strappado** or "Palestinian Hanging." It often leads to shoulder dislocation and brachial plexus injuries. **High-Yield Clinical Pearls for NEET-PG:** * **Diagnosis:** In chronic cases, MRI or Ultrasound may show thickening of the plantar fascia and atrophy of the intrinsic foot muscles. * **Other Torture Terms:** * **Submarino:** Forced immersion of the head in water (near-drowning). * **Dry Submarino:** Suffocation using a plastic bag over the head. * **Cheek burning:** Known as the "cigarette burn" sign. * **Istanbul Protocol:** The international guideline for the documentation of torture and its consequences.

Question 18: What type of bullet leaves a visible mark in its flight, allowing its path to be seen?

A. Tandem bullet
B. Tracer bullet (Correct Answer)
C. Dum-dum bullet
D. Incendiary bullet

Explanation: **Explanation:** The correct answer is **Tracer bullet**. **1. Why Tracer Bullet is Correct:** A tracer bullet is a specialized type of ammunition designed with a hollow base containing a pyrotechnic chemical composition (usually magnesium or phosphorus compounds). Upon firing, the propellant ignites this mixture, causing the bullet to burn brightly during its flight. This creates a visible trail of light or smoke, allowing the shooter to track the trajectory and adjust their aim. In forensic pathology, these are significant because they can cause thermal burns (singeing) along the track of the wound due to their high temperature. **2. Analysis of Incorrect Options:** * **Tandem bullet (Piggyback bullet):** This occurs when a bullet fails to leave the barrel (squib load) and is pushed out by a subsequent shot. Both bullets travel together, often resulting in two bullets entering through a single entry wound. They do not leave a visible flight path. * **Dum-dum bullet:** These are "expanding bullets" designed with a hollow point or soft nose. They are intended to expand or fragment upon impact to increase tissue damage (stopping power). They do not emit light during flight. * **Incendiary bullet:** These contain a chemical mixture (like white phosphorus) designed to ignite flammable targets (e.g., fuel tanks) upon impact. While they involve fire, their primary purpose is post-impact ignition rather than providing a visible flight path for the shooter. **3. High-Yield Facts for NEET-PG:** * **Souvenir Bullet:** A bullet that remains embedded in the body for a long time without causing immediate harm. * **Ricochet Bullet:** A bullet that deviates from its path after striking an intermediate object. * **Frangible Bullet:** Designed to break into tiny pieces upon impact to prevent over-penetration. * **Keyhole Wound:** Occurs when a bullet strikes the skull at an acute angle, causing a wound that is circular at one end and oval at the other.

Question 19: In a firearm injury, there is burning, blackening, and tattooing around the wound, along with a cherry-red color of the surrounding tissues and a cruciate shape. What type of injury is this?

A. Close shot entry
B. Close contact exit
C. Contact shot entry (Correct Answer)
D. Distant shot entry

Explanation: ### Explanation The correct answer is **Contact shot entry (Option C)**. This diagnosis is based on a combination of specific features that occur when the muzzle of a firearm is held firmly against the skin. **Why it is correct:** 1. **Cruciate Shape:** When a firearm is discharged in contact with skin overlying a flat bone (like the skull), the gases expand between the skin and the bone, causing the skin to burst outward in a "stellate" or "cruciate" (cross-shaped) pattern. 2. **Cherry-Red Color:** This is a pathognomonic sign of contact or near-contact shots. It occurs because **Carbon Monoxide (CO)** from the gunpowder combustion reacts with the hemoglobin in the underlying tissues to form **Carboxyhemoglobin**. 3. **Burning, Blackening, and Tattooing:** In a contact shot, these are often found *inside* the wound track or concentrated at the immediate margins because the muzzle is pressed against the body. **Why other options are incorrect:** * **Close shot entry (A):** While burning and tattooing are present, the wound is typically circular or oval, not cruciate. The cherry-red discoloration is less pronounced as gases disperse into the atmosphere. * **Close contact exit (B):** Exit wounds generally do not show burning, blackening, or tattooing (unless it is a "shored" exit wound, which still lacks the cherry-red CO effect). * **Distant shot entry (D):** These wounds are characterized by a clean "abrasion collar" and "grease ring," but they lack burning, blackening, tattooing, and the cruciate shape. **High-Yield Clinical Pearls for NEET-PG:** * **Muzzle Impression:** A "muzzle stamp" or "muzzle imprint" is the most certain sign of a hard contact shot. * **Tattooing (Peppering):** Caused by unburnt gunpowder grains embedding in the skin; it **cannot** be washed off (unlike blackening/smudging). * **Walker’s Test:** A chemical test used to detect nitrites in gunpowder residue to determine the shooting distance.

Question 20: Which section of the Indian Penal Code (IPC) includes vitriolage?

A. 318
B. 319
C. 320 (Correct Answer)
D. 321

Explanation: **Explanation:** **Correct Option: C (Section 320 IPC)** Section 320 of the Indian Penal Code defines **"Grievous Hurt."** It lists eight specific types of injuries that are legally classified as grievous. Vitriolage (the act of throwing acid or a corrosive substance) is included under the **8th clause** of Section 320, which covers any hurt that endangers life or causes the sufferer to be in severe bodily pain or unable to follow their ordinary pursuits for a period of **20 days**. Furthermore, permanent disfigurement of the head or face (common in vitriolage) is specifically mentioned under the **6th clause**. **Analysis of Incorrect Options:** * **Option A (Section 318):** This section deals with the **concealment of birth** by secret disposal of a dead body, whether the child died before, during, or after birth. * **Option B (Section 319):** This section defines **"Hurt."** It states that whoever causes bodily pain, disease, or infirmity to any person is said to cause hurt. It is a less severe classification than Section 320. * **Option D (Section 321):** This section defines **"Voluntarily causing hurt."** It describes the intent and knowledge required to be charged with causing hurt under Section 319. **High-Yield Clinical Pearls for NEET-PG:** * **Vitriolage Specifics:** While Section 320 defines the injury, **Sections 326A and 326B** (inserted via the Criminal Law Amendment Act, 2013) provide specific punishments for acid attacks and attempted acid attacks, respectively. * **The "20-Day Rule":** Any injury that prevents a person from performing daily activities for 20 days is legally "Grievous." * **Medical Findings in Vitriolage:** Look for "trickle marks" (streaks of chemical burns) and preservation of hair (as acid usually doesn't destroy hair shafts immediately, unlike fire). * **Antidote:** The immediate first aid for vitriolage is copious irrigation with water (except in rare cases of dry lime).

Practice by Chapter

Mechanical Injuries

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Transportation Injuries

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Fall from Height

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Blunt Force Trauma

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Sharp Force Trauma

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Ballistic Injuries

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Burn Injuries

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Drowning

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Electrocution

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Lightning Injuries

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Explosion Injuries

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Pattern Injuries and Their Recognition

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