PTH and Hypocalcemia: Upon ruling out all other major etiologies for seizures, initial evaluation identified severe hypocalcemia of 5.7 mg/dl [9–11], hyperphosphatemia of 11.5 mg/dl [5–9], and inappropriately low PTH of 20.7, alongside normal albumin, magnesium, potassium, chloride, blood gases, and vitamin D levels.