A 7-year old boy presents with a right-sided hemangioma and left-sided focal seizures. The most likely diagnosis is:
**Core Concept**
The question requires an understanding of the relationship between vascular malformations and seizures, specifically the association between Sturge-Weber syndrome (SWS) and its characteristic clinical features.
**Why the Correct Answer is Right**
Sturge-Weber syndrome is a congenital disorder characterized by a port-wine stain (a type of vascular malformation) on the face, typically involving the ophthalmic division of the trigeminal nerve. The presence of a hemangioma, particularly on the same side as the seizures, is highly suggestive of SWS. The seizures in SWS are thought to be secondary to the abnormal blood vessels in the brain, which can lead to cortical atrophy and calcifications. The calcifications are visible on imaging studies, such as CT scans or MRI, and are a hallmark of the disease.
**Why Each Wrong Option is Incorrect**
* **Option A:** This option is incorrect because it does not specifically address the relationship between vascular malformations and seizures, which is the key feature of SWS.
* **Option B:** This option is incorrect because it does not mention the characteristic port-wine stain, which is a diagnostic feature of SWS.
* **Option C:** This option is incorrect because it does not provide a clear connection between the patient's symptoms and a specific diagnosis.
**Clinical Pearl / High-Yield Fact**
Sturge-Weber syndrome is a rare condition, but it is an important consideration in pediatric patients with seizures and a port-wine stain. The presence of calcifications on imaging studies is a key diagnostic feature, and early recognition can lead to targeted management and improved outcomes.
**Correct Answer:** C. Sturge-Weber syndrome