A 10 year old boy presenting with cubitus a varus deformity and a history of trauma 3 months back on clinical examination, has preserved 3 bony point relationship of the elbow. The most probable diagnosis is?
**Core Concept**
The cubitus varus deformity in a child with a history of trauma suggests a possible fracture or injury to the growth plate of the elbow, leading to abnormal growth and development of the bone.
**Why the Correct Answer is Right**
The preserved 3 bony point relationship of the elbow indicates that the fracture did not involve the epicondyles, but rather the growth plate, which is responsible for the deformity. This is consistent with a supracondylar fracture of the humerus, a common injury in children with a history of trauma. The growth plate is located just above the condyles of the humerus, and a fracture in this area can lead to abnormal growth and development, resulting in a cubitus varus deformity.
**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect because a condylar fracture would likely involve the epicondyles, resulting in a different type of deformity and a different set of 3 bony point relationships.
**Option B:** This option is incorrect because a medial epicondylar fracture would not typically result in a cubitus varus deformity, and the 3 bony point relationship would be affected.
**Option C:** This option is incorrect because a lateral epicondylar fracture would not typically result in a cubitus varus deformity, and the 3 bony point relationship would be affected.
**Clinical Pearl / High-Yield Fact**
In children, the growth plate is responsible for bone growth and development, and fractures in this area can lead to abnormal growth and development, resulting in deformities such as cubitus varus.
**Correct Answer:** C. supracondylar fracture of the humerus