**Question:** Sphenoid wing dysplasia is seen in -

A. Craniosynostosis
B. Pfeiffer syndrome
C. Crouzon syndrome
D. Apert syndrome

**Core Concept:** Sphenoid wing dysplasia is a skeletal abnormality characterized by underdevelopment or abnormal shape of the sphenoid wing, which is a part of the skull. This condition is commonly associated with other craniofacial anomalies, particularly in the context of certain genetic syndromes.

**Why the Correct Answer is Right:** Sphenoid wing dysplasia is most commonly seen in patients with Apert syndrome, which is a rare autosomal dominant disorder characterized by premature fusion of cranial sutures, such as the coronal and sagittal sutures. This fusion leads to abnormal skull shape and development, including the sphenoid wing dysplasia.

**Why Each Wrong Option is Incorrect:**

A. Craniosynostosis (also known as premature closure of sutures) is a separate condition affecting only one or more cranial sutures, such as the sagittal, coronal, or lambdoid sutures. Sphenoid wing dysplasia is not specifically associated with craniosynostosis.

B. Pfeiffer syndrome is characterized by various skeletal and craniofacial abnormalities, including craniosynostosis, but it does not specifically involve the sphenoid wing dysplasia.

C. Crouzon syndrome is a form of craniosynostosis associated with abnormal skull shape, but it does not specifically involve the sphenoid wing dysplasia.

D. Apert syndrome, as explained above, is the correct answer that includes sphenoid wing dysplasia among its clinical features.

**Clinical Pearl:** Sphenoid wing dysplasia is a critical component of Apert syndrome, which is essential for medical professionals to recognize and diagnose the syndrome accurately. Accurate diagnosis helps in providing appropriate management and interventions for the patient.