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Outcome of adult patients with X-linked hypophosphatemia caused by PHEX gene mutations.

ABSTRACT: X-linked hypophosphatemia (XLH) is the most common monogenic disorder causing hypophosphatemia. This case-note review documents the clinical features and the complications of treatment in 59 adults (19 male, 40 female) with XLH. XLH is associated with a large number of private mutations; 37 different mutations in the PHEX gene were identified in this cohort, 14 of which have not been previously reported. Orthopaedic involvement requiring surgical intervention (osteotomy) was frequent. Joint replacement and decompressive laminectomy were observed in those older than 40 years. Dental disease (63%), nephrocalcinosis (42%), and hearing impairment (14%) were also common. The rarity of the disease and the large number of variants make it difficult to discern specific genotype-phenotype relationships. A new treatment, an anti-FGF23 antibody, that may affect the natural history of the disease is currently being investigated in clinical trials.

SUBMITTER: Chesher D 

PROVIDER: S-EPMC6133187 | biostudies-literature | 2018 Sep

REPOSITORIES: biostudies-literature

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Outcome of adult patients with X-linked hypophosphatemia caused by PHEX gene mutations.

Chesher Douglas D   Oddy Michael M   Darbar Ulpee U   Sayal Parag P   Casey Adrian A   Ryan Aidan A   Sechi Annalisa A   Simister Charlotte C   Waters Aoife A   Wedatilake Yehani Y   Lachmann Robin H RH   Murphy Elaine E  

Journal of inherited metabolic disease 20180219 5

X-linked hypophosphatemia (XLH) is the most common monogenic disorder causing hypophosphatemia. This case-note review documents the clinical features and the complications of treatment in 59 adults (19 male, 40 female) with XLH. XLH is associated with a large number of private mutations; 37 different mutations in the PHEX gene were identified in this cohort, 14 of which have not been previously reported. Orthopaedic involvement requiring surgical intervention (osteotomy) was frequent. Joint repl  ...[more]

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