This diaphragmatic elastography study is a preliminary pilot study to have first values of diaphragmatic stiffness in patients with a history of diaphragmatic hernia and to estimate the difference in stiffness compared to a group of patients without a history of hernia. The hypothesis is to be able to correlate the values found with the patients' symptomatology and thus to better monitor patients by a simple, accessible, painless and reproducible diagnostic tool, to better understand their evolution and even to be able to anticipate possible difficulties (reflux, respiratory disorders, scoliosis, etc.). Ultrasound elastography is a recent and clinically recognized method that uses an ultrasound approach to determine tissue stiffness in a non-invasive way.
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To estimate the difference in diaphragm stiffness between a group of children with a diaphragmatic hernia with or without a prosthesis and a group of children without any diaphragmatic pathology.
Timeframe: Baseline