Trauma Practice Questions

Q: Which of the following statements regarding this diagnosis is true?

Recurrence is a common complication. ***Recurrence is a common complication*** - **Anterior shoulder dislocation** has a high recurrence rate, especially in **young adults under 30 years**, where recurrence can exceed 80-90%. - **Recurrent dislocations** occur due to damage to the **glenoid labrum** (Bankart lesion) and capsular structures during the initial injury. *Common in children and rare in adults* - Anterior shoulder dislocation is **most common in adults**, particularly in the **20-40 year age group**. - In children, shoulder dislocations are relatively **rare** due to the greater elasticity of their joint capsules and ligaments. *May be overlooked as clinically occult* - Anterior shoulder dislocation presents with **obvious clinical signs** including loss of normal shoulder contour and severe pain. - The **squared-off shoulder** appearance and inability to move the arm make this injury readily apparent, not occult. *Is not associated with other bony or cartilaginous injury* - Anterior shoulder dislocation is commonly associated with **Hill-Sachs lesion** (compression fracture of the humeral head). - Also frequently involves **Bankart lesion** (tear of the anterior glenoid labrum) and potential **greater tuberosity fractures**.

Q: Which of the following statements regarding supracondylar fracture of the humerus in children is true?

Admission to the hospital is essential following reduction.. **Explanation:** Supracondylar fracture of the humerus is the most common elbow fracture in children (peak age 5–8 years). It is considered an **orthopaedic emergency** due to its proximity to vital neurovascular structures. **1. Why Option A is correct:** Admission following reduction is mandatory for **monitoring neurovascular status**. The primary concern is the development of **Volkmann’s Ischemia**, which can lead to Volkmann’s Ischemic Contracture (VIC). Post-reduction swelling or tight casting can compromise the brachial artery or cause Compartment Syndrome. Hourly observation for the "5 Ps" (Pain, Pallor, Pulselessness, Paresthesia, Paralysis) is essential for at least 24 hours. **2. Why the other options are incorrect:** * **Option B:** It is typically caused by a **fall on an outstretched hand (FOOSH)** with the elbow in extension (Extension type, >95%). A fall on the point of the elbow usually results in the rarer flexion-type fracture. * **Option C:** Most cases are managed by **Closed Reduction and Internal Fixation (CRIF)** using percutaneous K-wires. Open reduction is reserved only for failed closed attempts, vascular compromise, or compound injuries. * **Option D:** These are usually **closed fractures**. While the sharp proximal fragment can pierce the brachialis muscle and skin (puckering sign), frank compound injuries are not the norm. **High-Yield Clinical Pearls for NEET-PG:** * **Most common nerve injured:** Anterior Interosseous Nerve (AIN) – branch of the Median nerve (test by asking the child to make an "OK" sign). * **Most common deformity:** Cubitus Varus (Gun-stock deformity) due to malunion (remodeling does not correct rotation). * **Gartland Classification:** Used to grade severity (Type I: Undisplaced; Type II: Displaced with intact posterior cortex; Type III: Completely displaced).

Q: What is a fracture of the 5th metatarsal called?

Jones fracture. **Explanation:** The correct answer is **Jones fracture**. This refers to a transverse fracture at the **base of the 5th metatarsal**, specifically at the metaphyseal-diaphyseal junction (Zone 2). This area is clinically significant because it is a "watershed area" with a precarious blood supply, making these fractures prone to delayed union or non-union. **Analysis of Options:** * **Jones Fracture (Correct):** Occurs about 1.5 to 3 cm distal to the tuberosity. It must be distinguished from a **Pseudo-Jones fracture** (Avulsion fracture of the styloid process/tuberosity), which is more common and heals more easily. * **Malgaigne's Fracture:** A vertical shear injury of the pelvis involving double vertical fractures (fracture of the pubic rami anteriorly and disruption of the SI joint or ilium posteriorly). * **Cotton's Fracture:** A trimalleolar fracture of the ankle involving the medial malleolus, lateral malleolus, and the posterior malleolus (posterior lip of the tibia). * **Pott's Fracture:** A generic term for bimalleolar ankle fractures caused by eversion-external rotation injuries. **NEET-PG High-Yield Pearls:** 1. **Mechanism:** Jones fracture usually occurs due to a forceful adduction of the forefoot with the ankle in plantar flexion. 2. **Classification:** The **Lawrence and Botte classification** divides 5th metatarsal base fractures into three zones: Zone 1 (Pseudo-Jones), Zone 2 (Jones), and Zone 3 (Stress fracture of the proximal shaft). 3. **Management:** Jones fractures often require non-weight-bearing casts for 6–8 weeks or internal fixation (intramedullary screw) in athletes due to the high risk of non-union.

Q: A student presents with a shoulder injury sustained while playing football. On comparing the symmetry of his two shoulders, a marked elevation of the distal end of the clavicle with respect to the acromion is noted on the injured side. X-ray examination reveals a grade III shoulder separation. Which ligament must be torn for this injury to have occurred?

Coracoclavicular. **Explanation:** The clinical presentation of a "marked elevation of the distal end of the clavicle" (Step-off deformity) following trauma is characteristic of an **Acromioclavicular (AC) joint dislocation**, commonly referred to as a "shoulder separation." **1. Why Coracoclavicular (CC) is correct:** The stability of the AC joint depends on two sets of ligaments: the **Acromioclavicular ligaments** (horizontal stability) and the **Coracoclavicular ligaments** (vertical stability). The CC ligament complex consists of the **Conoid** and **Trapezoid** ligaments. In a **Grade III injury**, both the AC and CC ligaments are completely ruptured. Because the CC ligaments normally anchor the clavicle down to the coracoid process, their tear allows the clavicle to be pulled superiorly by the trapezius muscle, resulting in the visible elevation noted in the question. **2. Why other options are incorrect:** * **Coracoacromial:** This ligament connects two parts of the same bone (scapula). It forms the coracoacromial arch but does not stabilize the clavicle. * **Costoclavicular:** This ligament anchors the medial (sternal) end of the clavicle to the first rib. It is not involved in distal shoulder separations. * **Superior glenohumeral:** This is a component of the shoulder joint capsule (glenohumeral joint) and provides stability against inferior translation of the humeral head, not the clavicle. **Clinical Pearls for NEET-PG:** * **Rockwood Classification:** Grade I (Sprain), Grade II (AC torn, CC intact), Grade III (Both AC and CC torn; 25-100% displacement). * **Piano Key Sign:** A classic physical exam finding where the elevated distal clavicle can be depressed but springs back up. * **Management:** Grade I-III are typically managed conservatively (sling/rehab), while Grade IV-VI usually require surgical intervention.

Q: Fracture of the neck of the fifth metacarpal bone occurs in which type of fracture?

Boxer's fracture. **Explanation** **Correct Option: D. Boxer's fracture** A **Boxer’s fracture** is a fracture of the **neck of the fifth metacarpal**. It typically occurs when a person strikes a hard object with a closed fist. The mechanism involves an axial load transmitted through the shaft of the metacarpal, leading to volar (palmar) angulation of the distal fragment. While the name suggests professional boxing, it is more commonly seen in unskilled individuals who punch with an improper technique, impacting the object with the ulnar side of the hand rather than the second and third metacarpals. **Incorrect Options:** * **A. Hangman’s Fracture:** This refers to a traumatic spondylolisthesis of the **axis (C2)**, specifically a bilateral fracture through the pars interarticularis, usually caused by hyperextension of the neck. * **B. Jefferson’s Fracture:** This is a burst fracture of the **atlas (C1)**, involving both the anterior and posterior arches. It is typically caused by an axial load to the top of the head (e.g., diving into a shallow pool). * **C. Greenstick Fracture:** This is an **incomplete fracture** seen in children (pediatric population) where one side of the bone breaks while the other side merely bends, due to the higher collagen-to-mineral ratio in young bones. **High-Yield Clinical Pearls for NEET-PG:** * **Acceptable Angulation:** Up to 40° of volar angulation is often acceptable in the 5th metacarpal due to the mobility of the CMC joint; however, any **rotational deformity** (fingers overlapping on flexion) requires surgical correction. * **Splinting:** Managed with an **Ulnar Gutter Splint** in the "intrinsic plus" position. * **Barroom Fracture:** Occasionally, a fracture of the 4th or 5th metacarpal *shaft* is referred to as a Barroom fracture, though "Boxer's" specifically targets the neck.

Q: What is Jones fracture?

Avulsion fracture of the base of the fifth metatarsal. **Explanation:** **Jones Fracture** is a transverse fracture at the base of the **fifth metatarsal**, specifically occurring at the **metaphyseal-diaphyseal junction** (Zone 2). It is often caused by a forceful inversion of the foot. While the question identifies it as an avulsion fracture, it is clinically important to distinguish it from a "Pseudo-Jones" fracture. * **Why Option A is correct:** The base of the fifth metatarsal is a high-yield site for fractures. A true Jones fracture occurs about 1.5–3 cm distal to the tuberosity. It is notorious for **potential non-union** due to the "watershed area" (poor blood supply) at this specific junction. **Analysis of Incorrect Options:** * **Option B:** A bimalleolar fracture (involving medial and lateral malleoli) is known as a **Pott’s fracture**. * **Option C:** A burst fracture of the C1 vertebra (atlas) is known as a **Jefferson fracture**, typically caused by axial loading on the head. * **Option D:** An avulsion fracture of the medial femoral condyle (at the site of the MCL attachment) is known as a **Pellegrini-Stieda lesion** (often seen as calcification on X-ray). **NEET-PG High-Yield Pearls:** 1. **Pseudo-Jones (Dancer’s Fracture):** This is a true avulsion fracture of the **tuberosity** (Zone 1) by the **Peroneus brevis** tendon or plantar fascia. It has a better prognosis than a Jones fracture. 2. **Stress Fracture:** Occurs in Zone 3 (proximal diaphysis), common in athletes. 3. **Management:** Jones fractures often require non-weight-bearing casts or internal fixation (intramedullary screw) due to the high risk of non-union.

Q: A 21-year-old male with a fracture of the surgical neck of the humerus presents with a regimental badge sign and difficulty in abduction. What is the most likely nerve injury?

Axillary nerve injury. ### **Explanation** The correct answer is **Axillary nerve injury**. **1. Why Axillary Nerve Injury is Correct:** The axillary nerve (C5, C6) winds around the **surgical neck of the humerus** within the quadrangular space. Fractures at this site or anterior dislocations of the shoulder commonly result in its injury. * **Regimental Badge Sign:** The axillary nerve provides sensory innervation to the skin over the lower half of the deltoid muscle via the upper lateral cutaneous nerve of the arm. Loss of sensation in this specific area is known as the "Regimental Badge Sign." * **Difficulty in Abduction:** The nerve supplies the **deltoid** (the primary abductor of the arm after 15°) and the teres minor. Paralysis of the deltoid leads to significant weakness in abduction. **2. Why Other Options are Incorrect:** * **Ulnar Nerve Injury:** Typically occurs with fractures of the medial epicondyle of the humerus. It presents with "claw hand" and sensory loss in the medial 1.5 fingers, not abduction deficits. * **Klumpke's Paralysis:** This is a lower brachial plexus injury (C8-T1) usually caused by hyper-abduction of the arm. It results in a total claw hand and sensory loss along the ulnar aspect of the forearm and hand. * **Supraclavicular Nerve Injury:** These are cutaneous nerves from the cervical plexus (C3, C4) supplying the skin over the shoulder and clavicle. Injury would not cause motor weakness in abduction. **3. NEET-PG High-Yield Pearls:** * **Most common nerve injured in shoulder dislocation:** Axillary nerve. * **Most common nerve injured in mid-shaft humerus fracture:** Radial nerve (presents with wrist drop). * **Deltoid Atrophy:** Chronic axillary nerve palsy leads to the loss of the rounded contour of the shoulder, making it appear "flat." * **Abduction sequence:** 0–15° (Supraspinatus), 15–90° (Deltoid), >90° (Serratus anterior and Trapezius).

Question 1

Which of the following statements regarding this diagnosis is true?

Accepted Answer

Recurrence is a common complication

Answer

Common in children and rare in adults

Answer

May be overlooked as clinically occult

Answer

Is not associated with other bony or cartilaginous injury

Question 2

A 37-year-old female patient has a fracture of the clavicle. The junction of the inner and middle third of the bone exhibits overriding of the medial and lateral fragments. The arm is rotated medially, but it is not rotated laterally. Which of the following complications is most likely to occur secondary to the fractured clavicle?

Accepted Answer

Thrombosis of the subclavian vein, causing a pulmonary embolism

Answer

A fatal hemorrhage from the brachiocephalic vein

Answer

Thrombosis of the subclavian artery, causing an embolism in the ascending aorta

Answer

Damage to the upper trunk of the brachial plexus

Question 3

Which of the following is NOT a recognized feature of myositis ossificans?

Accepted Answer

The complication is less likely to occur in children.

Answer

It is a post-traumatic ossification.

Answer

It often follows posterior dislocation or supracondylar fracture of the elbow joint.

Answer

Diagnosis is made with certainty by skiagraphy.

Question 4

Which of the following statements regarding supracondylar fracture of the humerus in children is true?

Accepted Answer

Admission to the hospital is essential following reduction.

Answer

It is typically caused by a fall on the point of the elbow.

Answer

It usually requires open reduction.

Answer

It is commonly a compound fracture.

Question 5

What is a fracture of the 5th metatarsal called?

Accepted Answer

Jones fracture

Answer

Malgaigne's fracture

Answer

Cotton's fracture

Answer

Pott's fracture

Question 6

A student presents with a shoulder injury sustained while playing football. On comparing the symmetry of his two shoulders, a marked elevation of the distal end of the clavicle with respect to the acromion is noted on the injured side. X-ray examination reveals a grade III shoulder separation. Which ligament must be torn for this injury to have occurred?

Accepted Answer

Coracoclavicular

Answer

Coracoacromial

Answer

Costoclavicular

Answer

Superior glenohumeral

Question 7

What is the most common dangerous complication of posterior dislocation of the knee?

Accepted Answer

Popliteal artery injury

Answer

Sciatic nerve injury

Answer

Ischemia of the lower leg compartment

Answer

Femoral artery injury

Question 8

Fracture of the neck of the fifth metacarpal bone occurs in which type of fracture?

Accepted Answer

Boxer's fracture

Answer

Hangman's fracture

Answer

Jefferson's fracture

Answer

Greenstick fracture

Question 9

What is Jones fracture?

Accepted Answer

Avulsion fracture of the base of the fifth metatarsal

Answer

Bimalleolar fracture of the ankle

Answer

Burst fracture of the first cervical vertebra

Answer

Avulsion fracture of the medial femoral condyle

Question 10

A 21-year-old male with a fracture of the surgical neck of the humerus presents with a regimental badge sign and difficulty in abduction. What is the most likely nerve injury?

Accepted Answer

Axillary nerve injury

Answer

Ulnar nerve injury

Answer

Klumpke's paralysis

Answer

Supraclavicular nerve injury

Trauma — MCQs

Trauma — MCQs

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