## **Core Concept**
The carrying angle, also known as the cubitus angle, is the angle between the long axis of the humerus and the forearm when the arm is fully extended and the forearm is supinated. It averages about 5-15 degrees in adults. Abnormalities in this angle can result from various elbow pathologies.

## **Why the Correct Answer is Right**
A decreased carrying angle is characteristic of a **cubitus varus deformity**, also known as a "gunstock deformity." This deformity typically occurs after a supracondylar fracture of the humerus, which is a common elbow fracture in children. The deformity results from inadequate reduction or healing of the fracture, leading to a loss of the normal carrying angle.

## **Why Each Wrong Option is Incorrect**
* **Option A:** A **cubitus valgus deformity** is associated with an **increased** carrying angle, often resulting from a lateral condylar fracture of the humerus. Therefore, it is incorrect for a decreased carrying angle.
* **Option C:** A **cubitus normalis** or any other term suggesting a normal carrying angle would not describe a deformity and thus does not apply here.
* **Option D:** Without specific details on the deformity or condition associated with option D, we focus on the correct answer provided.

## **Clinical Pearl / High-Yield Fact**
A key clinical correlation to remember is that a **cubitus varus deformity** (decreased carrying angle) is more common and often considered more cosmetically acceptable than a cubitus valgus deformity. However, significant deformities can lead to functional issues and cosmetic concerns.

## **Correct Answer:** .