Neonatal severe primary hyperparathyroidism (NSHPT) is a rare and life-threatening autosomal recessive genetic disorder caused by a wide range of inactivating mutations in Calcium sensing receptors. We introduced a three-day-old neonate with poor feeding, failure to thrive, and lethargy. The laboratory results showed uncontrolled hypercalcemia with hyperparathyroidism; therefore, the patient was referred to a pediatric surgeon for parathyroidectomy. We showed that neonates with NSHPT could be treated with total parathyroidectomy with autotransplant without transplant-induced hypercalcemia.
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