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Growth and metabolic control during puberty in girls with X-linked hypophosphataemic rickets
Etienne Sochett1, Andrea S Doria, Flavia Henriques
1Division of Endocrinology, Hospital for Sick Children, University of Toronto, Toronto, Ont, Canada.
Objective:
X-linked hypophosphataemic rickets (XLH) results in defective bone mineralization and impaired growth. Treatment with oral phosphate (Pi) and calcitriol improves but does not normalize growth. This study assessed whether pubertal growth and metabolic control contribute to the height deficit.
Methods:
Study included patients with XLH who were treated with Pi-calcitriol from diagnosis to adult height; their hospital records, biochemistry and radiographs were reviewed.
Results:
Six females with XLH were included. Their mean peak height velocity and total height gain during puberty were nearly normal despite deteriorating metabolic control.
Conclusions:
In treated girls with XLH, the pubertal growth is nearly normal despite suboptimal metabolic control. The major height loss occurs prior to puberty and is not recovered during the pubertal growth spurt.
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