Abstract
Severe forms of hypophosphatasia due to loss-of-function in the ALPL gene may present with diverse neurological problems including pyridoxine-responsive seizures. We present a short report of pyridoxine-responsive neonatal seizures. Due to severe osteopenia with unmeasurable levels of alkaline phosphatase, targeted genetic screening was performed and two pathogenic variants in the gene for the nonspecific alkaline phosphatase confirmed the diagnosis of hypophosphatasia. We would like to emphasize the importance of considering infantile hypophosphatasia in the differential diagnosis of pyridoxine-responsive seizures with concomitant low alkaline phosphatase level and bone pathology, especially with the new treatments becoming available in the future.
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