## **Core Concept**
The question tests knowledge of cranial sutures and their impact on skull development. The sagittal suture is a fibrous joint that allows for growth of the skull. Premature closure (synostosis) of cranial sutures can lead to various skull deformities.

## **Why the Correct Answer is Right**
Early closure of the sagittal suture restricts growth in the transverse plane, leading to compensatory growth in the anteroposterior plane. This results in a long, narrow skull shape, known as **scaphocephaly**. Scaphocephaly is characterized by a keel-shaped or boat-shaped skull.

## **Why Each Wrong Option is Incorrect**
* **Option A:** This option is incorrect because early closure of the coronal suture would lead to a different type of skull deformity, such as brachycephaly (short, wide skull).
* **Option B:** This option is incorrect as it does not accurately describe the consequence of sagittal suture closure.
* **Option C:** This option might seem plausible but does not accurately represent the specific deformity caused by sagittal suture closure.
* **Option D:** This option is incorrect because it does not accurately describe scaphocephaly.

## **Clinical Pearl / High-Yield Fact**
A key point to remember is that scaphocephaly, caused by premature closure of the sagittal suture, is the most common type of craniosynostosis. Early diagnosis and surgical intervention are crucial to prevent complications and improve cosmetic outcomes.

## **Correct Answer:** . Scaphocephaly