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Bone ultrasonography at phalanxes in patients with Rett syndrome: a 3-year longitudinal study
S Gonnelli1, C Caffarelli, J Hayek
1Department of Internal Medicine, Endocrine-Metabolic Science and Biochemistry, University of Siena, Policlinico Le Scotte, Viale Bracci 2, 53100 Siena, Italy. gonnelli@unisi.it
Abstract:
Osteopenia is a frequent and early complication of Rett syndrome. This study aimed to evaluate the usefulness of Quantitative Ultrasonography (QUS) at phalanxes in the assessment and monitoring of bone status in Rett patients. We studied 109 girls (10.1+/-6.1 years; range 3-25 years) and 101 age-matched controls. Serum calcium (Ca), bone alkaline phosphatase (B-ALP), parathyroid hormone (PTH), 25-hydroxyvitamin D (25OHD) and QUS parameters at phalanxes by Bone Profiler-IGEA (amplitude dependent speed of sound: AD-SoS and bone transmission time: BTT) were measured. At baseline both QUS parameters and 25OHD levels were significantly lower in Rett patients than in controls. Serum 25OHD was inversely correlated with serum PTH and BTT Z-score and BTT Z-score was significantly lower (p<0.05) in the girls with a 25OHD serum levels
