Can I have epilepsy even if all electroencephalograms (EEGs) are normal?

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27-year-old man presents with sudden severe epigastric and right upper quadrant abdominal pain that began one hour ago, accompanied by five episodes of vomiting and a brief witnessed tonic‑clonic seizure without incontinence. He now has shortness of breath, diaphoresis, blood pressure 150/90 mm Hg, heart rate in the 70s, respiratory rate 28, oxygen saturation 99% on room air, and temperature 36.3 °C. Physical exam reveals a soft, flat abdomen with epigastric and right upper quadrant tenderness, a positive Murphy’s sign, and no rebound tenderness. No past medical history, no prior surgeries, and no known drug or food allergies. Point‑of‑care glucose is 96 mg/dL and electrocardiogram shows sinus rhythm without ischemic changes. What is the assessment, differential diagnosis, and management plan?

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