A 15 year old boy had 10–12 partial complex seizures per day inspite of adequate 4 drugs antiepileptic regime. He had a history of repeated high-grade fever in childhood. MRI for epilepsy protocol revealed normal brain scan. What should be the best noninvasive strategy to make a definite diagnosis so that he can be prepared to undergo epilepsy surgery –

**Core Concept**
The underlying principle being tested is the diagnosis and management of **refractory epilepsy**, specifically in a patient with a history of seizures despite adequate antiepileptic medication. The patient's history of repeated high-grade fever in childhood and normal brain MRI scan suggests a possible **encephalitic** or **inflammatory** cause.

**Why the Correct Answer is Right**
To make a definite diagnosis and prepare the patient for epilepsy surgery, a noninvasive strategy such as **video-EEG monitoring** would be ideal. This involves recording the patient's EEG and video simultaneously to capture and analyze seizure activity. However, the correct answer is not provided, but typically, **Option C: Video-EEG monitoring** or a similar diagnostic tool would be the best choice.

**Why Each Wrong Option is Incorrect**
**Option A:** Without the specific option, it's challenging to provide a detailed explanation, but typically, options that do not involve direct monitoring of seizure activity or are invasive would be incorrect.
**Option B:** Similarly, without the specific option, it's hard to explain, but options that do not contribute to localizing the seizure focus or are not diagnostic would be incorrect.
**Option D:** This option would likely be incorrect if it involves an invasive procedure or does not directly contribute to diagnosing the seizure type or focus.

**Clinical Pearl / High-Yield Fact**
In patients with refractory epilepsy, **video-EEG monitoring** is a crucial diagnostic tool for localizing the seizure focus and determining the type of seizures, which is essential for planning epilepsy surgery. It allows for the correlation of clinical seizure manifestations with EEG findings.

**Correct Answer:** Unfortunately, without the provided answer choices, the correct answer cannot be directly stated, but it would typically involve a noninvasive diagnostic strategy like video-EEG monitoring.

✓ Correct Answer: D. Video EEG with Ictal 99m Tc – HMPAO Brain SPECT