Diagnosis typically occurs during the first 6 months of life due to characteristic neurological symptoms. These symptoms include muscle spasms, tetany, and seizures. Laboratory testing indicates<unk>  (decreased serum magnesium levels),<unk>  (decreased serum calcium levels), and little to no measurable parathyroid hormone levels. Diagnosis is confirmed with these symptoms and can be further solidified with genetic sequencing of the TRPM6 gene.
Hypomagnesemia with secondary hypocalcemia
Exercise-associated hyponatremia
Chronic recurrent multifocal osteomyelitis
Hypotonic hyponatremia
Normophosphatemic familial tumoral calcinosis
Secondary hyperparathyroidism
Familial hypocalciuric hypercalcemia
Isotonic hyponatremia