What is the most common bone to be fractured in children?

Correct Answer: D. Distal forearm bones

Distal forearm fractures (radius and ulna) are the most common bone fractures in children, accounting for 40–50% of all pediatric fractures in Indian orthopedic series. The distal radius is particularly vulnerable because of the child's natural falling pattern—when a child falls, the instinctive protective response is to extend the arm and land on an outstretched hand (FOOSH mechanism). The distal forearm has a large metaphyseal region with relatively weak cancellous bone and incomplete ossification, making it prone to buckle fractures, greenstick fractures, and complete fractures. The most common variant is a Colles' fracture (dorsal displacement of distal radius fragment), followed by greenstick fractures in younger children (age 5–8 years) where the bone bends without complete break due to higher elasticity. The distal radius also bears significant load during pronation and supination, and the metaphyseal region undergoes rapid remodeling during growth, creating a zone of relative weakness. In Indian pediatric trauma centers, distal forearm fractures represent the leading cause of orthopedic emergency department visits in the 5–14 age group, often managed conservatively with closed reduction and immobilization in above-elbow plaster casts.

Why the other options are wrong

A. Clavicle — Clavicle fractures are the second most common pediatric fracture (15–20% of all fractures), typically from direct trauma or fall on the shoulder. However, they occur less frequently than distal forearm fractures. Clavicle fractures are often managed conservatively and have excellent prognosis with minimal complications, making them less clinically urgent than distal forearm injuries. B. Carpals — Carpal bone fractures are rare in children because the carpals are largely cartilaginous and do not ossify until late childhood/adolescence. When trauma occurs to the wrist in young children, the force is more likely to cause distal radius/ulna fractures rather than carpal fractures, which are more common in adults with fully ossified carpals. C. Humerus — Humeral fractures (supracondylar, lateral condyle, medial epicondyle) are important pediatric injuries but occur less frequently than distal forearm fractures. Supracondylar fractures are the most common elbow fracture in children but represent only 10–15% of all pediatric fractures, making them less common overall than distal forearm injuries.

High-Yield Facts

Mnemonics

FOOSH → Forearm Fracture Fall On OutStretched Hand → Distal Forearm (radius/ulna) fracture. The child's protective instinct to break a fall with extended arms makes the distal forearm the impact zone. Pediatric Fracture Frequency (Top 3)

NBE Trap

NBE may present clavicle fractures as a distractor because they are the second most common pediatric fracture and are frequently discussed in trauma teaching rounds. Students who memorize "clavicle is common" without knowing the rank order may select it over the correct answer.

Clinical Pearl

In Indian pediatric emergency departments, a child presenting with wrist pain and swelling after a fall is statistically most likely to have a distal radius fracture. Early recognition and closed reduction within 24 hours minimizes malunion and functional impairment, allowing most children to return to normal activities within 4–6 weeks of immobilization.

_Reference: Bailey & Love Ch. 37 (Fractures and Dislocations); OP Ghai Pediatric Nursing Ch. 15 (Pediatric Trauma)_