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Title

Diffusion-weighted imaging findings in Perthes disease with dynamic gadolinium-enhanced subtracted (DGS) MR correlation: a preliminary study

Authors
Anooshiravani, Mehrak
Published in Pediatric Radiology. 2010, vol. 40, no. 3, p. 318-325
Abstract BACKGROUND: Legg-Calve-Perthes disease (LCP) is necrosis of the proximal femoral epiphysis of vascular origin. Clinical course and outcome in LCP disease varies considerably between different patients. Earlier prognostic criteria than those offered by conventional radiography are necessary to identify children who require prompt surgical treatment. OBJECTIVE: To assess the significance of signal alteration on diffusion-weighted MR imaging (DWI MR) in LCP. MATERIALS AND METHODS: Twelve boys with unilateral LCP disease (Catterall grade 2 and 3), at the initial sclerotic stage and early fragmentation phase, underwent dynamic gadolinium-enhanced subtracted (DGS) and DWI MR. For DGS MR, the lateral pillar enhancement was recorded. For DWI imaging, we measured ADC values in the diseased and the unaffected epiphyses and metaphyses. Receiver operating characteristic curves were performed to analyze the performance of DWI in establishing agreement with the results of DGS MR, which is the gold standard for prognosis. RESULTS: Femoral epiphysis increased diffusivity was observed in the affected hip in all cases. Increased metaphysis diffusivity in the affected side was observed in all cases with absent lateral pillar enhancement at DGS MR. CONCLUSION: DWI seems to be a noninvasive means of distinguishing between Perthes disease with favourable and unfavourable prognosis.
Keywords Child, PreschoolContrast MediaDiffusion Magnetic Resonance Imaging/*methodsFemur/*pathologyFemur Head Necrosis/complications/*pathologyHumansLegg-Calve-Perthes Disease/complications/*pathologyMaleMeglumine/*diagnostic useOrganometallic Compounds/*diagnostic usePilot ProjectsReproducibility of ResultsSensitivity and SpecificityStatistics as Topic*Subtraction Technique
Identifiers
PMID: 20052464
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Research groups Radiologie neuro-diagnostique et neuro-interventionnelle en pédiatrie (842)
Groupe Lascombes Pierre (orthopédie pédiatrique) (917)
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MERLINI, Laura et al. Diffusion-weighted imaging findings in Perthes disease with dynamic gadolinium-enhanced subtracted (DGS) MR correlation: a preliminary study. In: Pediatric Radiology, 2010, vol. 40, n° 3, p. 318-325. https://archive-ouverte.unige.ch/unige:21137

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Deposited on : 2012-05-23

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