Postnatal Pancraniosynostosis in a Patient With Infantile Hypophosphatasia

Area of Science:

• Metabolic bone diseases
• Pediatric genetics
• Craniofacial development

Background:

• Hypophosphatasia (HPP) is a rare inherited metabolic disorder affecting bone mineralization.
• It is caused by mutations in the ALPL gene, leading to low activity of tissue-nonspecific alkaline phosphatase.
• HPP commonly presents with skeletal abnormalities, including rickets/osteomalacia and craniosynostosis (premature fusion of cranial sutures).

Observation:

• This report details the first case of delayed onset pancraniosynostosis in a patient with infantile hypophosphatasia.
• The patient presented with fused cranial sutures later than typically observed in HPP-associated craniosynostosis.
• The specific pattern and timing of cranial suture fusion were notable.

Findings:

• The study documents a unique presentation of pancraniosynostosis in infantile hypophosphatasia.
• Delayed onset suggests variability in the phenotypic expression of HPP regarding craniofacial development.
• The findings underscore the complex interplay between metabolic dysfunction and skeletal morphogenesis.

Implications:

• This case challenges the typical understanding of craniosynostosis timing in infantile hypophosphatasia.
• Healthcare providers should consider delayed craniosynostosis in the evaluation of patients with HPP.
• Further research is needed to understand the mechanisms underlying delayed presentation and inform clinical management strategies.