Cubitus valgus is seen in
**Core Concept**
Cubitus valgus, also known as gunstock deformity, is a condition characterized by a visible angulation of the elbow, where the forearm deviates away from the midline of the body. It is often the result of a previous injury or fracture, particularly of the distal humerus or radial head.
**Why the Correct Answer is Right**
The correct answer is associated with the type of fracture that commonly results in cubitus valgus. A supracondylar fracture of the humerus, especially if it is not properly reduced or if it develops a nonunion, can lead to cubitus valgus due to the distal fragment growing in a more lateral direction than the proximal fragment. This is because the distal fragment is often subjected to a greater degree of tension, causing it to drift away from the midline.
**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect as cubitus varus, not valgus, is associated with a different type of fracture, where the distal fragment grows in a more medial direction.
**Option B:** This option is incorrect as it is unrelated to cubitus valgus; the condition is specifically related to elbow deformity.
**Option C:** This option is incorrect as it is a type of fracture that can lead to cubitus varus, not valgus.
**Clinical Pearl / High-Yield Fact**
When assessing a patient with cubitus valgus, it is essential to take a thorough history, including any previous injuries or fractures, as this can help guide management and prevent future complications. A radiograph of the elbow should also be obtained to confirm the diagnosis and assess the degree of angulation.
**Correct Answer: D. Supracondylar fracture of the humerus.**