**Core Concept**
A fracture of the lateral condyle of the humerus is a type of injury that affects the elbow joint, specifically the lateral part of the distal humerus. This type of fracture can lead to various complications due to the anatomy and function of the elbow joint. The **lateral condyle** plays a crucial role in the stability and movement of the elbow.

**Why the Correct Answer is Right**
The correct answer is related to the potential complications that can arise from a fracture of the lateral condyle of the humerus. One of the most significant complications is the development of a **cubitus valgus** deformity, which can occur if the fracture is not properly aligned or if it heals in a malunited position. This deformity can lead to further issues, such as limited range of motion and increased risk of degenerative joint disease.

**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect because it does not accurately describe a common complication of a lateral condyle fracture.
**Option B:** This option is also incorrect as it is not directly related to the specific complications associated with this type of fracture.
**Option C:** Similarly, this option does not accurately represent a known complication of a lateral condyle fracture of the humerus.

**Clinical Pearl / High-Yield Fact**
It's essential to remember that fractures of the lateral condyle of the humerus, especially in children, can lead to **growth disturbances** if not managed properly. The lateral condyle is involved in the growth of the elbow, and any disruption can result in long-term consequences.

**Correct Answer:** D. Nonunion