A mother brought her child which has got a vascular plaque like lesion over the lateral aspect of forehead mainly involving ophthalmic and maxillary division of trigeminal nerve. Mother says that the lesion remains unchanged since bih. Also mother gives a history that the child is on valproate for seizure disorder. The probable diagnosis is

**Core Concept**
The question is testing the student's knowledge of congenital vascular malformations and their clinical presentation, particularly in relation to the trigeminal nerve distribution.

**Why the Correct Answer is Right**
The description provided suggests a congenital vascular malformation, specifically a **port-wine stain** (also known as a **naevus flammeus**) combined with a possible **cavernous malformation**. The lesion's location over the ophthalmic and maxillary divisions of the trigeminal nerve is consistent with a **port-wine stain**. The fact that the lesion has remained unchanged since birth supports this diagnosis. Additionally, the history of seizure disorder treated with valproate may be related to the presence of a **cavernous malformation**, which can cause seizures.

**Why Each Wrong Option is Incorrect**
**Option A:** This option is likely a distractor and not a specific condition. Without more information, it's difficult to evaluate this option.
**Option B:** This could be a distractor, but without more context, it's hard to say for sure. Some conditions may present with vascular lesions, but the provided information doesn't strongly support this option.
**Option C:** This option is likely incorrect because it doesn't match the description provided in the question. The lesion's location and the patient's history don't strongly suggest this diagnosis.

**Clinical Pearl / High-Yield Fact**
It's essential to remember that congenital vascular malformations can be associated with seizures, particularly those involving the cerebral cortex. The presence of a port-wine stain should prompt further investigation for underlying vascular malformations.

**Correct Answer:** D. Sturge-Weber syndrome

✓ Correct Answer: C. Sturage weber syndrome