Most common complication of lateral condyle humerus fracture
**Core Concept**
A lateral condyle humerus fracture is a type of supracondylar fracture that occurs in the distal humerus, specifically involving the lateral condyle. This fracture is common in children and has a high risk of complications due to the growth plate's involvement.
**Why the Correct Answer is Right**
The most common complication of lateral condyle humerus fracture is nonunion or malunion, which can lead to a persistent elbow deformity and limited range of motion. This is due to the fracture's proximity to the growth plate, which can disrupt the blood supply to the fracture site and hinder healing. Additionally, the lateral condyle plays a crucial role in elbow stability, and its damage can lead to chronic instability and recurrent dislocations.
**Why Each Wrong Option is Incorrect**
**Option A:** Cubitus varus deformity is a complication of lateral condyle fractures, but it is not the most common complication. Cubitus varus occurs when the distal fragment of the fracture heals in a varus position, resulting in a characteristic "gunstock" deformity.
**Option B:** Radial nerve palsy is a potential complication of lateral condyle fractures, but it is not as common as nonunion or malunion. Radial nerve palsy occurs when the nerve is damaged during the fracture or subsequent treatment.
**Option C:** Osteochondritis dissecans is a possible complication of lateral condyle fractures, but it is not the most common complication. Osteochondritis dissecans occurs when a fragment of cartilage and bone becomes detached from the surrounding bone.
**Option D:** Myositis ossificans is a potential complication of lateral condyle fractures, but it is not as common as nonunion or malunion. Myositis ossificans occurs when heterotopic ossification forms in the surrounding muscle.
**Clinical Pearl / High-Yield Fact**
To prevent complications, early reduction and stable fixation of the fracture are essential. Additionally, monitoring for signs of nonunion or malunion, such as persistent pain or limited range of motion, is crucial.
**Correct Answer:** C.