Self limiting neonatal primary hyperparathyroidism associated with familial hypocalciuric hypercalcaemia

Area of Science:

• Pediatric Endocrinology
• Genetics
• Calcium Metabolism

Background:

• Neonatal hyperparathyroidism is a rare condition affecting infant calcium and phosphate levels.
• Familial hypocalciuric hypercalcemia (FHH) is an autosomal dominant disorder affecting calcium sensing receptors.
• Genetic factors can significantly influence calcium homeostasis in newborns.

Observation:

• A 7-week-old infant presented with severe biochemical and radiological signs of neonatal hyperparathyroidism.
• The infant's condition resolved spontaneously by 6 months of age.
• The patient's father and paternal relatives exhibited hypercalcemia, suggestive of FHH.

Findings:

• The case demonstrates a severe presentation of neonatal hyperparathyroidism.
• Resolution of hyperparathyroidism by 6 months suggests a potentially transient or responsive form.
• The family history strongly indicates an underlying genetic predisposition, likely FHH, impacting calcium regulation across generations.

Implications:

• This case underscores the importance of considering genetic causes, such as FHH, in neonatal hyperparathyroidism.
• Early identification of familial hypercalcemia syndromes is crucial for managing affected infants and at-risk relatives.
• Further research into the genetic basis and clinical spectrum of FHH in neonates is warranted.