Hereditary hypophosphatemic rickets and craniosynostosis

Area of Science:

• Pediatric Endocrinology
• Craniofacial Surgery
• Medical Genetics

Background:

• Hypophosphatemic rickets (HPR) is a rare genetic disorder affecting phosphate metabolism.
• Craniosynostosis, premature fusion of skull sutures, is an underrecognized complication of HPR.
• This study investigates the clinical characteristics and outcomes of HPR patients with craniosynostosis.

Purpose of the Study:

• To describe the clinical and auxological features of children with HPR and craniosynostosis.
• To outline the typical treatment strategies employed for this combined condition.
• To compare these characteristics with HPR patients lacking craniosynostosis.

Main Methods:

• An observational, retrospective cohort study design was utilized.
• Data were collected from clinical notes and cranial imaging of 96 children with HPR.
• Fifty patients with available skull images were included for analysis.

Main Results:

• Craniosynostosis was identified in 52% (26/50) of the HPR cohort.
• No significant differences in growth parameters or biochemical markers were found between groups.
• Dolichocephaly and isolated scaphocephaly were the most common presentations, affecting sagittal suture fusion.

Conclusions:

• Craniosynostosis is a frequent, yet often missed, complication in pediatric hypophosphatemic rickets.
• Early recognition is vital, as some patients present with normal head circumference, necessitating vigilance.
• A multidisciplinary team approach is essential for optimal diagnosis and long-term management.