Trauma — MCQs

Trauma Indian Medical PG Practice Questions and MCQs

Question 131: What is a Pott's fracture?

A. Talus fracture
B. Bimalleolar ankle fracture (Correct Answer)
C. Trimalleolar ankle fracture
D. None of the above

Explanation: **Explanation:** **Pott’s fracture** is a classic eponym used to describe a **bimalleolar ankle fracture**. It typically occurs due to an eversion-abduction force, leading to fractures of both the medial malleolus (tibia) and the lateral malleolus (fibula). This injury disrupts the ankle mortise, making it inherently unstable and usually requiring surgical intervention (Open Reduction and Internal Fixation). **Analysis of Options:** * **Option B (Correct):** By definition, a Pott’s fracture involves both malleoli. Sir Percivall Pott originally described this injury as a fracture of the fibula 2-3 inches above the ankle joint combined with a rupture of the medial collateral (deltoid) ligament or a medial malleolus avulsion. * **Option A (Incorrect):** Talus fractures are distinct injuries often caused by high-energy axial loading (e.g., Aviator’s fracture). * **Option C (Incorrect):** A trimalleolar fracture involves the medial, lateral, and posterior malleolus (the posterior lip of the tibia). This is specifically known as a **Cotton’s fracture**. **High-Yield Clinical Pearls for NEET-PG:** * **Mechanism:** Forced eversion and external rotation of the foot. * **Dupuytren’s Fracture:** A variant of Pott’s fracture involving a fibular fracture higher up (distal third) with rupture of the tibiofibular ligaments and the deltoid ligament. * **Maisonneuve Fracture:** A high proximal fibular fracture associated with a medial malleolus fracture or deltoid ligament tear; always palpate the proximal fibula in ankle injuries. * **Stability:** Any fracture involving two or more points of the ankle ring (malleoli or ligaments) is considered unstable.

Question 132: Fracture of the upper third of the ulna with proximal radioulnar dislocation is known as:

A. Monteggia fracture (Correct Answer)
B. Galeazzi fracture
C. Barton fracture
D. Colles fracture

Explanation: **Explanation:** The correct answer is **Monteggia fracture**. This injury is defined as a fracture of the proximal third (upper third) of the ulna shaft associated with a dislocation of the radial head at the proximal radioulnar joint (PRUJ). **Understanding the Concept:** In the forearm, the radius and ulna are linked like a closed chain. A significant displaced fracture in one bone usually necessitates a dislocation or fracture in the other. In Monteggia's injury, the ulnar fracture provides the force that displaces the radial head. **Analysis of Incorrect Options:** * **Galeazzi fracture:** This is the "reverse" of a Monteggia. It involves a fracture of the **distal third of the radius** with dislocation of the **distal radioulnar joint (DRUJ)**. * **Barton fracture:** An intra-articular fracture of the distal radius with dislocation/subluxation of the radiocarpal joint. It can be volar (more common) or dorsal. * **Colles fracture:** An extra-articular fracture of the distal radius (within 2 cm of the joint) with characteristic **dorsal displacement** (Dinner fork deformity). It does not involve radioulnar dislocation. **High-Yield Clinical Pearls for NEET-PG:** * **Mnemonic (MUGR):** **M**onteggia = **U**lna fracture; **G**aleazzi = **R**adius fracture. (The fracture site is the bone named). * **Bado Classification:** Used to classify Monteggia fractures based on the direction of radial head dislocation (Type I/Anterior is the most common). * **Nerve Injury:** The **Posterior Interosseous Nerve (PIN)**, a branch of the radial nerve, is the most commonly injured nerve in Monteggia fractures. * **Management:** In adults, these are unstable injuries requiring **ORIF (Open Reduction and Internal Fixation)** with a plate and screw for the ulna; the radial head usually reduces spontaneously once the ulna length is restored.

Question 133: What is the first priority in managing a severely injured patient with a spinal fracture and unconsciousness?

A. Glasgow Coma Scale (GCS) scoring
B. Spinal stabilization using a cervical collar
C. Administer mannitol drip to decrease intracranial pressure (ICP)
D. Airway maintenance (Correct Answer)

Explanation: **Explanation:** The management of a polytrauma patient follows the **ATLS (Advanced Trauma Life Support)** protocol, which prioritizes life-threatening conditions in a specific sequence: **ABCDE** (Airway, Breathing, Circulation, Disability, Exposure). **Why Airway maintenance is the correct answer:** In an unconscious patient, the tongue often falls back, obstructing the oropharynx. Regardless of other injuries (spinal or cranial), **Airway (A)** is the absolute first priority. Without a patent airway, oxygenation fails, leading to rapid irreversible brain damage and death. In cases of suspected spinal injury, the airway must be secured while maintaining **Manual In-line Axial Stabilization (MIAS)** to protect the cord. **Analysis of Incorrect Options:** * **B. Spinal stabilization:** While critical in spinal fractures, it is part of "A" (Airway with cervical spine protection). However, if the airway is blocked, the patient will die before spinal stability becomes the limiting factor. * **A. GCS scoring:** This is part of the **Disability (D)** assessment. It is performed only after ABC (Airway, Breathing, and Circulation) have been stabilized. * **C. Administer mannitol:** This is a specific treatment for raised intracranial pressure (ICP). It is a secondary intervention and is never prioritized over the primary survey (ABCDE). **NEET-PG High-Yield Pearls:** * **The "Golden Hour":** The first 60 minutes after trauma where prompt intervention significantly reduces mortality. * **Airway in Trauma:** The preferred method to open the airway in a suspected spine injury is the **Jaw Thrust maneuver**, as it avoids neck extension (unlike the Head-tilt/Chin-lift). * **Definitive Airway:** An endotracheal tube is the gold standard for securing the airway in an unconscious patient (GCS ≤ 8).

Question 134: Malunited Colles fracture can lead to which deformity?

A. Garden spade deformity
B. Gunshot deformity
C. Swan neck deformity
D. Dinner fork deformity (Correct Answer)

Explanation: **Explanation:** A **Colles fracture** is a distal radius fracture occurring within 2.5 cm of the wrist joint, typically resulting from a fall on an outstretched hand (FOOSH). The characteristic deformity associated with both the acute fracture and its malunion is the **Dinner fork deformity**. **1. Why "Dinner fork deformity" is correct:** This deformity is caused by the **posterior (dorsal) displacement** and **dorsal tilt** of the distal fragment of the radius. When viewed from the side, the dorsal prominence of the distal fragment combined with the depression caused by the fracture line mimics the curved shape of a dinner fork. **2. Analysis of Incorrect Options:** * **A. Garden spade deformity:** This is characteristic of a **Smith’s fracture** (Reverse Colles). It occurs due to the **ventral (volar) displacement** of the distal fragment, resembling the shape of a gardener's spade. * **B. Gunstock deformity:** Also known as *Cubitus Varus*, this is a common complication of a malunited **Supracondylar fracture of the humerus**, not a wrist fracture. * **C. Swan neck deformity:** This is a finger deformity (hyperextension of the PIP joint and flexion of the DIP joint) typically seen in **Rheumatoid Arthritis** or following volar plate injuries. **Clinical Pearls for NEET-PG:** * **Displacements in Colles:** There are six classic displacements: Dorsal displacement, Dorsal tilt, Lateral displacement, Lateral tilt, Impaction, and Supination. * **Most common complication:** Stiffness of the joints (shoulder, elbow, fingers). * **Specific late complication:** Rupture of the **Extensor Pollicis Longus (EPL)** tendon due to friction against the irregular bone at Lister’s tubercle. * **Median Nerve:** Acute carpal tunnel syndrome can occur due to volar protrusion of the proximal fragment.

Question 135: A tennis player presented with pain and tenderness at the lateral epicondyle of the humerus. These findings are consistent with which diagnosis?

A. Tennis elbow (Correct Answer)
B. Golfer's elbow
C. Fibrositis
D. Dupuytren's contracture

Explanation: ### Explanation **Correct Option: A. Tennis Elbow** Tennis elbow, or **Lateral Epicondylitis**, is a clinical condition characterized by pain and tenderness over the lateral epicondyle of the humerus. It is caused by repetitive stress and microtrauma to the common extensor origin, specifically involving the **Extensor Carpi Radialis Brevis (ECRB)** muscle. Despite the name, it is more common in non-athletes performing repetitive gripping or wrist extension tasks. Pain is typically exacerbated by resisted wrist extension and supination. **Incorrect Options:** * **B. Golfer’s Elbow:** Also known as **Medial Epicondylitis**, this involves the common flexor origin (primarily Pronator teres and Flexor carpi radialis). Pain is localized to the *medial* epicondyle and is aggravated by resisted wrist flexion. * **C. Fibrositis:** This is an older term for Fibromyalgia. It involves chronic, widespread musculoskeletal pain and specific "tender points" across the body, rather than localized inflammation at a bony epicondyle. * **D. Dupuytren’s Contracture:** This is a progressive fibrosis of the **palmar fascia**, leading to permanent flexion deformities of the fingers (most commonly the ring and little fingers). It does not involve the elbow. **High-Yield Clinical Pearls for NEET-PG:** * **Most common muscle involved:** Extensor Carpi Radialis Brevis (ECRB). * **Clinical Tests:** * **Cozen’s Test:** Pain on resisted wrist extension with the elbow flexed. * **Mill’s Test:** Pain on passive wrist flexion and forearm pronation while extending the elbow. * **Management:** Primarily conservative (Rest, NSAIDs, bracing, and eccentric exercises). Refractory cases may require corticosteroid or PRP injections, or surgical release (Nirschl procedure).

Question 136: Which of the following structures experiences discontinuity in axonotmesis?

A. Perineurium
B. Epineurium
C. Endoneurium
D. Axon (Correct Answer)

Explanation: In peripheral nerve injuries, the **Seddon Classification** is the gold standard for categorization. **Axonotmesis** represents a Grade II injury where there is physical disruption of the **axon** and its myelin sheath, but the supporting connective tissue frameworks remain intact. ### Why the Correct Answer is Right: In axonotmesis, the axon is severed, leading to **Wallerian degeneration** distal to the site of injury. However, because the internal "scaffolding" (endoneurium, perineurium, and epineurium) is preserved, the regenerating axonal sprouts have a guided pathway to reach their target organs. This results in a good prognosis for functional recovery, typically at a rate of **1 mm/day**. ### Why Other Options are Wrong: * **Endoneurium (C):** This is the innermost connective tissue layer. In axonotmesis, the endoneurium remains **intact**. If the endoneurium is disrupted, the injury is classified as Sunderland Grade III. * **Perineurium (A) & Epineurium (B):** These are the middle and outermost layers, respectively. They remain preserved in axonotmesis. Their disruption signifies more severe trauma (**Neurotmesis**), where surgical intervention is usually mandatory for any hope of recovery. ### High-Yield Clinical Pearls for NEET-PG: * **Neuropraxia (Grade I):** Temporary physiological conduction block (e.g., Saturday Night Palsy). No Wallerian degeneration occurs; recovery is rapid (days to weeks). * **Neurotmesis (Grade V):** Complete transection of the entire nerve trunk. Requires surgical repair. * **Tinel’s Sign:** In axonotmesis, a "distal tingling sensation" on percussion (Tinel’s sign) moves distally as the nerve regenerates, which is a positive prognostic indicator. In neurotmesis, the sign remains stationary at the site of injury.

Question 137: A 66-year-old female developed pain while walking, with shortening and external rotation of the limb and broadening of the greater trochanter. What is the possible diagnosis?

A. Fracture of the neck of the femur
B. Fracture of the intertrochanteric femur (Correct Answer)
C. Acetabular fracture
D. Central dislocation of the hip

Explanation: ### Explanation The clinical presentation of a 66-year-old female with pain, limb shortening, and external rotation following minor trauma is classic for a **hip fracture**. **1. Why Intertrochanteric (IT) Fracture is the Correct Answer:** The key differentiating feature in this question is the **"broadening of the greater trochanter."** * **Anatomy:** IT fractures occur in the extracapsular region between the greater and lesser trochanters. Because this area is highly vascular and cancellous, the fracture often results in significant comminution and hematoma formation, leading to palpable broadening of the trochanteric area. * **Deformity:** Since the fracture is extracapsular, the distal fragment is completely free from the stabilizing effect of the capsule. This leads to **marked external rotation** (often 80–90°, where the lateral border of the foot touches the bed) and significant **shortening**. **2. Why Other Options are Incorrect:** * **Fracture Neck of Femur:** While this also presents with shortening and external rotation, it is **intracapsular**. The capsule limits the degree of displacement; thus, external rotation is typically less severe (30–45°), and there is **no broadening** of the greater trochanter. * **Acetabular Fracture:** This usually follows high-energy trauma (e.g., dashboard injury). It presents with hip pain and restricted movements, but not typically with the classic "shortened and externally rotated" posture unless associated with a dislocation. * **Central Dislocation of Hip:** This occurs when the femoral head is driven through the acetabular floor. It typically presents with **shortening** but the limb is often in a **neutral or internal position**, and the trochanter is "sunken" or less prominent, rather than broadened. **3. NEET-PG High-Yield Pearls:** * **External Rotation:** IT Fracture (marked, ~90°) > Neck of Femur Fracture (moderate, ~45°). * **Ecchymosis:** More common in IT fractures (extracapsular) than neck fractures (intracapsular). * **Bryant’s Triangle & Shoemaker’s Line:** Used clinically to assess the elevation of the greater trochanter in hip fractures. * **Treatment Gold Standard:** Dynamic Hip Screw (DHS) or Cephalomedullary nails (e.g., PFN).

Question 138: Carpal fusion is seen in which of the following conditions?

A. Apert's syndrome
B. Rheumatoid arthritis
C. Post-traumatic cases
D. All of the above (Correct Answer)

Explanation: **Explanation:** Carpal fusion (carpal coalition) refers to the abnormal union of two or more carpal bones. It can be classified into **congenital** (failure of segmentation during development) or **acquired** (secondary to inflammatory or traumatic processes). * **Apert’s Syndrome:** This is a congenital acrocephalosyndactyly syndrome. It is characterized by craniosynostosis, midface hypoplasia, and symmetric syndactyly of hands and feet. Carpal and tarsal fusions are hallmark skeletal features of this condition. * **Rheumatoid Arthritis (RA):** In chronic inflammatory conditions like RA, the destruction of articular cartilage leads to joint space narrowing. As the disease progresses, the resulting pannus and subsequent fibrous or bony ankylosis frequently lead to acquired carpal fusion. * **Post-traumatic cases:** Severe trauma, especially intra-articular fractures or dislocations (e.g., perilunate injuries), can lead to secondary osteoarthritis. The end-stage of localized joint destruction and immobilization often results in bony fusion. **Clinical Pearls for NEET-PG:** * **Most common congenital carpal fusion:** Lunotriquetral fusion (often asymptomatic and an incidental finding). * **Ellis-van Creveld Syndrome:** Another high-yield congenital cause of carpal fusion (specifically capitate-hamate fusion) associated with polydactyly and dwarfism. * **Turner Syndrome:** Often associated with a short fourth metacarpal and occasionally carpal abnormalities. * **Infection:** Chronic infections like **Tuberculosis** of the wrist are a classic cause of acquired bony ankylosis (fusion).

Question 139: Lisfranc fracture dislocation involves which joint complex?

A. Lunate
B. Scaphoid
C. Tarso-metatarsal (Correct Answer)
D. Capitate

Explanation: **Explanation:** The **Lisfranc joint complex** refers to the **tarso-metatarsal (TMT) joints**, which represent the articulation between the midfoot (cuneiforms and cuboid) and the forefoot (bases of the five metatarsals). The hallmark of this injury is the disruption of the **Lisfranc ligament**, a strong oblique band connecting the lateral aspect of the medial cuneiform to the base of the second metatarsal. Because there is no transverse ligament between the first and second metatarsal bases, this ligament is the primary stabilizer of the midfoot arch. Injury typically occurs due to high-energy trauma (RTA) or indirect axial loading on a plantar-flexed foot. **Analysis of Options:** * **Option C (Correct):** Lisfranc injuries specifically involve the tarso-metatarsal joints. Radiographically, this is often seen as a widening of the space between the 1st and 2nd metatarsal bases (the "fleck sign"). * **Options A, B, and D (Incorrect):** The **Lunate, Scaphoid, and Capitate** are carpal bones located in the **wrist**. Injuries involving these bones include Scaphoid fractures (most common carpal fracture) or Perilunate dislocations, but they have no anatomical relation to the Lisfranc complex in the foot. **High-Yield Clinical Pearls for NEET-PG:** * **Fleck Sign:** An avulsion fracture of the 2nd metatarsal base; pathognomonic for Lisfranc injury. * **Chopart’s Joint:** The mid-tarsal joint (calcaneocuboid and talonavicular joints). Do not confuse this with Lisfranc. * **Clinical Sign:** Plantar ecchymosis (bruising on the sole of the midfoot) is highly suggestive of a Lisfranc injury. * **Management:** Stable injuries are treated with non-weight-bearing casts; unstable injuries require ORIF (Open Reduction Internal Fixation).

Question 140: Malgaigne feature is associated with which type of fracture?

A. Shoulder fracture
B. Pelvis fracture (Correct Answer)
C. Spine fracture
D. Scapular fracture

Explanation: **Explanation:** **Malgaigne fracture** is a classic, high-energy injury of the **pelvis**. It is defined as a vertical shear fracture-dislocation of the pelvic ring. Specifically, it involves a double vertical fracture: one occurring anteriorly (through the pubic rami) and one occurring posteriorly (through the sacroiliac joint, sacrum, or ilium) on the same side (ipsilateral). This results in an unstable "vertical shear" pattern where one hemipelvis is displaced superiorly. **Analysis of Options:** * **B. Pelvis fracture (Correct):** The mechanism involves a vertical force (like a fall from height onto one leg), causing disruption of both the anterior and posterior pelvic arches. * **A. Shoulder fracture:** While the shoulder can suffer various eponymous fractures (like Hill-Sachs or Bankart lesions), Malgaigne is strictly pelvic. * **C. Spine fracture:** Spine fractures are often associated with pelvic trauma (e.g., Chance fractures or burst fractures), but Malgaigne refers specifically to the pelvic ring. * **D. Scapular fracture:** These are typically caused by direct high-energy trauma to the chest wall but are unrelated to the Malgaigne description. **Clinical Pearls for NEET-PG:** * **Mechanism:** Vertical shear (most unstable pelvic injury). * **Clinical Sign:** Shortening of the affected lower limb (due to superior migration of the hemipelvis) without a hip fracture. * **Radiology:** Look for superior displacement of the hemipelvis and disruption of the sacroiliac joint. * **Complications:** High risk of massive retroperitoneal hemorrhage and internal organ injury. * **Note:** Do not confuse this with **Malgaigne’s Luxation**, which is an older term for an elbow dislocation (Monteggia-like variant), though in modern exams, "Malgaigne" almost exclusively refers to the pelvis.

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Principles of Fracture Management

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Upper Limb Fractures

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Lower Limb Fractures

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Spinal Trauma

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Pelvic and Acetabular Fractures

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Open Fractures

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Fractures in Children

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Fracture Complications

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Nonunion and Malunion

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Polytrauma Management

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Joint Dislocations

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Soft Tissue Injuries

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Trauma — MCQs

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