**Question:** All of the following are true regarding fracture of lateral condyle of humerus except -

A. A fracture of the lateral condyle of the humerus is a common injury in children due to the physiology of their growth plates.
B. The fracture involves the lateral condyle, a bony projection on the upper arm bone (humerus).
C. The fracture is typically caused by a direct blow to the lateral aspect of the elbow joint.
D. The fracture heals faster in adults than in children due to the different bone density.

**Correct Answer:** D. The fracture heals faster in adults than in children due to the different bone density.

**Core Concept:** Fractures of the lateral condyle of the humerus are a common injury in children and adolescents, particularly during growth spurts when the growth plates are still open. The lateral condyle is a bony projection on the upper arm bone (humerus). These fractures typically occur due to direct trauma to the lateral aspect of the elbow joint.

**Why the Correct Answer is Right:** In adults, especially those with closed growth plates, fractures heal relatively faster than in children. This is because adult bones have a higher bone mineral density and a more compact bone structure, which promotes faster bone healing and union. In contrast, children with open growth plates have a lower bone mineral density and a more porous bone structure, which can lead to slower bone healing and increased risk of complications such as malunion or nonunion.

**Why Each Wrong Option is Incorrect:**

A. While fractures of the lateral condyle are common in children, the correct statement should be that adult bones have a higher bone mineral density and a more compact bone structure, promoting faster healing.

B. The statement about adults having closed growth plates is also relevant, but the focus should be on the higher bone mineral density and more compact bone structure in adults contributing to faster healing.

C. The reason for the fracture occurring due to a direct blow to the lateral aspect of the elbow joint is accurate, as this is the typical mechanism of injury in this location.

**Clinical Pearl:** Understanding these differences in healing rates between pediatric and adult fractures is essential for appropriate patient management and counseling. In pediatric patients, it is important to emphasize the potential for slower healing and increased risk of complications, while in adults, focus on the quicker healing process.