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01-02-2017 | Original Article

The time to and determinants of first fractures in boys with Duchenne muscular dystrophy

Authors: J. Ma, H. J. McMillan, G. Karagüzel, C. Goodin, J. Wasson, M. A. Matzinger, P. DesClouds, D. Cram, M. Page, V. N. Konji, B. Lentle, L. M. Ward

Published in: Osteoporosis International | Issue 2/2017

Abstract

Summary

Boys with vertebral fractures (VF) identified through routine spine radiographs had milder, less symptomatic, and fewer VF compared to those diagnosed with VF following consultation for back pain. Spontaneous (i.e., medication-unassisted) reshaping of fractured vertebral bodies was absent. Long bone fractures were present even before Duchenne muscular dystrophy (DMD) diagnosis in some boys.

Introduction

The objective of the study was to determine the time to and characteristics of first fractures in Duchenne muscular dystrophy.

Methods

This study was a retrospective longitudinal study of 30 boys with DMD <18 years. Boys were classified into four groups according to their first fracture: those with VF identified on routine lateral spine radiographs, those with VF diagnosed following consultation for back pain, those with long bone fractures, and those without fractures.

Results

Compared to boys diagnosed with VF as their initial fracture following consultation for back pain, those with VF surveillance radiographs had shorter durations of glucocorticoid (GC) therapy at the time of VF diagnosis (median 1.6 versus 5.3 years, p < 0.01), higher areal (mean ± standard deviation −1.4 ± 0.7 versus −3.1 ± 0.8, p = 0.01), and volumetric (−0.3 ± 0.5 versus −2.6 ± 0.8, p < 0.01) lumbar spine bone mineral density Z-scores, as well as fewer VF (median 1.4 versus 5.2 per person, p < 0.01) and a lower median spinal deformity index (median 1.5 versus 9.5, p < 0.01). Vertebral body reshaping following VF was not observed. Ten boys sustained a long bone fracture as their first fracture at a mean age of 8.9 ± 4.0 years; four of these boys later sustained a total of 27 incident VF.

Conclusions

Routine lateral spine radiographs led to detection of VF in their earlier stages, vertebral body reshaping following VF was absent, and VF were frequent after the first long bone fracture. These results support the inclusion of a lateral spine radiograph starting at the time of GC initiation as part of routine bone health monitoring in DMD.

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Title: The time to and determinants of first fractures in boys with Duchenne muscular dystrophy
Authors: J. Ma
H. J. McMillan
G. Karagüzel
C. Goodin
J. Wasson
M. A. Matzinger
P. DesClouds
D. Cram
M. Page
V. N. Konji
B. Lentle
L. M. Ward
Publication date: 01-02-2017
Publisher: Springer London
Published in: Osteoporosis International / Issue 2/2017
Print ISSN: 0937-941X
Electronic ISSN: 1433-2965
DOI: https://doi.org/10.1007/s00198-016-3774-5

Keynote webinar | Spotlight on medication adherence

Springer Medicine

The time to and determinants of first fractures in boys with Duchenne muscular dystrophy

Abstract

Summary

Introduction

Methods

Results

Conclusions

Keynote webinar | Spotlight on medication adherence

Springer Medicine

Abstract

Summary

Introduction

Methods

Results

Conclusions

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