A 15 day old baby presented to the emergency depament with history of seizures. Blood tests revealed serum calcium of 5mg/dl, serum phosphate of 9 mg/dl and an intact PTH of 30 pg/ml (Normal Intact PTH = 10-60 pg/ml). Which of the following is the most likely diagnosis?
High-Yield Explanation
Baby is showing features of relative hypoparathyroidism. In hypoparathyroidism serum calcium level is decreased, Phosphate level is increased and PTH levels is inappropriately normal, low or undetectable. Ref: Endocrinology and Metabolism By Pauline M. Camacho page77; The Cambridge encyclopedia of human paleopathology By Ahur C. Aufderheide, Conrado Rodriguez-Main, Odin Langsjoen page 333.